1. A 0.5 kg drone traveling 15 m/s crashes into a tree. What is the momentum of the drone before and after the crash?(1 point) Responses 7.5 kg ⋅ m/s before and 0 kg ⋅ m/s after 7.5 kg ⋅ m/s before and 0 kg ⋅ m/s after 30 kg ⋅ m/s before and 0 kg ⋅ m/s after 30 kg ⋅ m/s before and 0 kg ⋅ m/s after 0 kg ⋅ m/s before and after due to the crash 0 kg ⋅ m/s before and after due to the crash 7.5 kg ⋅ m/s before and after 7.5 kg ⋅ m/s before and after Question 2 2. A water balloon is thrown toward a target at 18 m/s. If the water balloon has a mass of 0.4 kg, what is its momentum?(1 point) Responses 7.2 kg m 7.2 kg m 7.2 kg m/s 7.2 kg m/s 18.4 kg m/s 18.4 kg m/s 45 kg m/s 45 kg m/s Question 3 3. What is the momentum of a car with a mass of 2,000 kg moving at a constant velocity of 20 m/s?(1 point) Responses 100 kg m/s 100 kg m/s 40,000 kg m/s 40,000 kg m/s 0.01 kg m/s 0.01 kg m/s 0 kg m/s 0 kg m/s Question 4 4. A large metal ball is at rest, and a small rubber ball is moving at a high velocity. When they collide, the large metal ball begins to roll slowly. What must have happened to the momentum of the small rubber ball?(1 point) Responses it must have increased it must have increased it must have decreased it must have decreased it must have become zero it must have become zero it must have stayed the same it must have stayed the same Question 5 5. If an astronaut in space pushes off the satellite she is working on, what will happen to her if there are no other acting external forces?(1 point) Responses She will move in the same direction at the same speed forever. She will move in the same direction at the same speed forever. She will continuously speed up. She will continuously speed up. She will eventually slow down and come to a stop. She will eventually slow down and come to a stop. She will periodically change direction. She will periodically change direction. Question 6 6. Which situation best represents a closed environment?(1 point) Responses two balls colliding in midair two balls colliding in midair two balls colliding under water two balls colliding under water two balls colliding on a pool table two balls colliding on a pool table two balls colliding in deep space two balls colliding in deep space Question 7 7. Which force, in real life, will have the least effect on a bowling ball rolling down a lane toward bowling pins?(1 point) Responses friction friction air resistance air resistance magnetism magnetism gravity gravity Question 8 8. Which series of steps describes how to demonstrate conservation of momentum in a system of two moving particles that collide?(1 point) Responses Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are zero. Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are zero. Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are the same. Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are the same. Determine the momentums of one of the particles before and after the collision and add them together. Determine the momentums of the other particle before and after the collision and add them together. Verify that both sums are the same. Determine the momentums of one of the particles before and after the collision and add them together. Determine the momentums of the other particle before and after the collision and add them together. Verify that both sums are the same. Determine the momentums of one of the particles before and after the collision and add them together. Determine the momentums of the other particle before and after collision and add them together. Verify that both sums are zero. Determine the momentums of one of the particles before and after the collision and add them together. Determine the momentums of the other particle before and after collision and add them together. Verify that both sums are zero. Question 9 9. Two ice skaters want to prove conservation of momentum. Skater A has a mass of 72 kg, and skater B has a mass of 48 kg. They are originally at rest. They hold hands and face each other. They then push off each other and move in opposite directions. Skater B moves with a velocity of 3 m/s. What must the velocity of skater A be in the opposite direction after the push in order to prove conservation of momentum? (1 point) Responses 1.5 m/s 1.5 m/s 3.0 m/s 3.0 m/s 2.0 m/s 2.0 m/s 4.5 m/s 4.5 m/s Question 10 10. An ice skater at rest on ice catches a dance partner moving 2.5 m/s during a performance. The ice skater has a mass of 68 kg and the dance partner has a mass of 54 kg. What is the speed of the ice skater and dance partner after the collision?(1 point) Responses 1.4 m/s 1.4 m/s 2.3 m/s 2.3 m/s 2.0 m/s 2.0 m/s 1.1 m/s 1.1 m/s Question 11 11. A machine works with an efficiency of 18%. The energy input is 500 joules/second. How much useful energy will the machine generate in 15 minutes?(1 point) Responses 81 KJ 81 KJ 135 KJ 135 KJ 1.35 KJ 1.35 KJ 25 KJ 25 KJ Question 12 12. A lever is being used to try to lift a heavy object, but it is not working. Which of these actions would increase the output force the most?(1 point) Responses Increase the input force and increase the output displacement. Increase the input force and increase the output displacement. Increase the input force and increase the output displacement. Increase the input force and increase the output displacement. Decrease the input force and decrease the output displacement. Decrease the input force and decrease the output displacement. Decrease the input force and increase the output displacement. Decrease the input force and increase the output displacement. Question 13 13. A box with a weight of 50 newtons rests at the bottom of a ramp and is pushed to the end of the ramp with a force of 20 newtons. This ramp is an inclined plane that is 10 meters long. What is the maximum height of the ramp?(1 point) Responses 25 m 25 m 200 m 200 m 4 m 4 m 2.5 m 2.5 m Question 14 14. A 0.135 kg ball is tossed upward from a height of 1.20 m above the ground with an initial speed of 15.0 m/s . What is the ball’s total mechanical energy at the moment it is tossed upward?(1 point) Responses 1.59 J 1.59 J 16.8 J 16.8 J 13.6 J 13.6 J 15.2 J 15.2 J Question 15 15. A 0.09 kg beetle climbs vertically a distance of 0.35 m up a wall at a speed of 0.02 m/s. What is the beetle’s power output?(1 point) Responses 0.3087 W 0.3087 W 15.44 W 15.44 W 0.006174 A 0.006174 A 0.01764 W 0.01764 W Question 16 16. Two dogs were running with the same velocity after a ball. One dog was twice as large as the other. Which statement can be made about the momentum of the dogs?(1 point) Responses Neither dog had momentum. Neither dog had momentum. The larger dog had half the momentum of the smaller dog. The larger dog had half the momentum of the smaller dog. The larger dog had twice the momentum of the smaller dog. The larger dog had twice the momentum of the smaller dog. Both dogs had the same momentum. Both dogs had the same momentum.

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Here are the answers to your questions:

Question 1

Response: 7.5 kg ⋅ m/s before and 0 kg ⋅ m/s after

Question 2

Response: 7.2 kg ⋅ m/s

Question 3

Response: 40,000 kg ⋅ m/s

Question 4

Response: it must have decreased

Question 5

Response: She will move in the same direction at the same speed forever.

Question 6

Response: two balls colliding in deep space

Question 7

Response: magnetism

Question 8

Response: Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are the same.

Question 9

Response: 4.5 m/s

Question 10

Response: 1.4 m/s

Question 11

Response: 81 KJ

Question 12

Response: Increase the input force and increase the output displacement.

Question 13

Response: 2.5 m

Question 14

Response: 16.8 J

Question 15

Response: 0.3087 W

Question 16

Response: The larger dog had twice the momentum of the smaller dog.

Feel free to ask if you need more clarification on any of the questions!

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Question

1. A 0.5 kg drone traveling 15 m/s crashes into a tree. What is the momentum of the drone before and after the crash?(1 point) Responses 7.5 kg ⋅ m/s before and 0 kg ⋅ m/s after 7.5 kg ⋅ m/s before and 0 kg ⋅ m/s after 30 kg ⋅ m/s before and 0 kg ⋅ m/s after 30 kg ⋅ m/s before and 0 kg ⋅ m/s after 0 kg ⋅ m/s before and after due to the crash 0 kg ⋅ m/s before and after due to the crash 7.5 kg ⋅ m/s before and after 7.5 kg ⋅ m/s before and after Question 2 2. A water balloon is thrown toward a target at 18 m/s. If the water balloon has a mass of 0.4 kg, what is its momentum?(1 point) Responses 7.2 kg m 7.2 kg m 7.2 kg m/s 7.2 kg m/s 18.4 kg m/s 18.4 kg m/s 45 kg m/s 45 kg m/s Question 3 3. What is the momentum of a car with a mass of 2,000 kg moving at a constant velocity of 20 m/s?(1 point) Responses 100 kg m/s 100 kg m/s 40,000 kg m/s 40,000 kg m/s 0.01 kg m/s 0.01 kg m/s 0 kg m/s 0 kg m/s Question 4 4. A large metal ball is at rest, and a small rubber ball is moving at a high velocity. When they collide, the large metal ball begins to roll slowly. What must have happened to the momentum of the small rubber ball?(1 point) Responses it must have increased it must have increased it must have decreased it must have decreased it must have become zero it must have become zero it must have stayed the same it must have stayed the same Question 5 5. If an astronaut in space pushes off the satellite she is working on, what will happen to her if there are no other acting external forces?(1 point) Responses She will move in the same direction at the same speed forever. She will move in the same direction at the same speed forever. She will continuously speed up. She will continuously speed up. She will eventually slow down and come to a stop. She will eventually slow down and come to a stop. She will periodically change direction. She will periodically change direction. Question 6 6. Which situation best represents a closed environment?(1 point) Responses two balls colliding in midair two balls colliding in midair two balls colliding under water two balls colliding under water two balls colliding on a pool table two balls colliding on a pool table two balls colliding in deep space two balls colliding in deep space Question 7 7. Which force, in real life, will have the least effect on a bowling ball rolling down a lane toward bowling pins?(1 point) Responses friction friction air resistance air resistance magnetism magnetism gravity gravity Question 8 8. Which series of steps describes how to demonstrate conservation of momentum in a system of two moving particles that collide?(1 point) Responses Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are zero. Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are zero. Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are the same. Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are the same. Determine the momentums of one of the particles before and after the collision and add them together. Determine the momentums of the other particle before and after the collision and add them together. Verify that both sums are the same. Determine the momentums of one of the particles before and after the collision and add them together. Determine the momentums of the other particle before and after the collision and add them together. Verify that both sums are the same. Determine the momentums of one of the particles before and after the collision and add them together. Determine the momentums of the other particle before and after collision and add them together. Verify that both sums are zero. Determine the momentums of one of the particles before and after the collision and add them together. Determine the momentums of the other particle before and after collision and add them together. Verify that both sums are zero. Question 9 9. Two ice skaters want to prove conservation of momentum. Skater A has a mass of 72 kg, and skater B has a mass of 48 kg. They are originally at rest. They hold hands and face each other. They then push off each other and move in opposite directions. Skater B moves with a velocity of 3 m/s. What must the velocity of skater A be in the opposite direction after the push in order to prove conservation of momentum? (1 point) Responses 1.5 m/s 1.5 m/s 3.0 m/s 3.0 m/s 2.0 m/s 2.0 m/s 4.5 m/s 4.5 m/s Question 10 10. An ice skater at rest on ice catches a dance partner moving 2.5 m/s during a performance. The ice skater has a mass of 68 kg and the dance partner has a mass of 54 kg. What is the speed of the ice skater and dance partner after the collision?(1 point) Responses 1.4 m/s 1.4 m/s 2.3 m/s 2.3 m/s 2.0 m/s 2.0 m/s 1.1 m/s 1.1 m/s Question 11 11. A machine works with an efficiency of 18%. The energy input is 500 joules/second. How much useful energy will the machine generate in 15 minutes?(1 point) Responses 81 KJ 81 KJ 135 KJ 135 KJ 1.35 KJ 1.35 KJ 25 KJ 25 KJ Question 12 12. A lever is being used to try to lift a heavy object, but it is not working. Which of these actions would increase the output force the most?(1 point) Responses Increase the input force and increase the output displacement. Increase the input force and increase the output displacement. Increase the input force and increase the output displacement. Increase the input force and increase the output displacement. Decrease the input force and decrease the output displacement. Decrease the input force and decrease the output displacement. Decrease the input force and increase the output displacement. Decrease the input force and increase the output displacement. Question 13 13. A box with a weight of 50 newtons rests at the bottom of a ramp and is pushed to the end of the ramp with a force of 20 newtons. This ramp is an inclined plane that is 10 meters long. What is the maximum height of the ramp?(1 point) Responses 25 m 25 m 200 m 200 m 4 m 4 m 2.5 m 2.5 m Question 14 14. A 0.135 kg ball is tossed upward from a height of 1.20 m above the ground with an initial speed of 15.0 m/s . What is the ball’s total mechanical energy at the moment it is tossed upward?(1 point) Responses 1.59 J 1.59 J 16.8 J 16.8 J 13.6 J 13.6 J 15.2 J 15.2 J Question 15 15. A 0.09 kg beetle climbs vertically a distance of 0.35 m up a wall at a speed of 0.02 m/s. What is the beetle’s power output?(1 point) Responses 0.3087 W 0.3087 W 15.44 W 15.44 W 0.006174 A 0.006174 A 0.01764 W 0.01764 W Question 16 16. Two dogs were running with the same velocity after a ball. One dog was twice as large as the other. Which statement can be made about the momentum of the dogs?(1 point) Responses Neither dog had momentum. Neither dog had momentum. The larger dog had half the momentum of the smaller dog. The larger dog had half the momentum of the smaller dog. The larger dog had twice the momentum of the smaller dog. The larger dog had twice the momentum of the smaller dog. Both dogs had the same momentum. Both dogs had the same momentum.

1 answer

Here are the answers to your questions:

Question 1

Response: 7.5 kg ⋅ m/s before and 0 kg ⋅ m/s after

Question 2

Response: 7.2 kg ⋅ m/s

Question 3

Response: 40,000 kg ⋅ m/s

Question 4

Response: it must have decreased

Question 5

Response: She will move in the same direction at the same speed forever.

Question 6

Response: two balls colliding in deep space

Question 7

Response: magnetism

Question 8

Response: Determine the momentums of the two particles before the collision and add them together. Determine the momentums of the two particles after the collision and add them together. Verify that both sums are the same.

Question 9

Response: 4.5 m/s

Question 10

Response: 1.4 m/s

Question 11

Response: 81 KJ

Question 12

Response: Increase the input force and increase the output displacement.

Question 13

Response: 2.5 m

Question 14

Response: 16.8 J

Question 15

Response: 0.3087 W

Question 16

Response: The larger dog had twice the momentum of the smaller dog.

Feel free to ask if you need more clarification on any of the questions!

Ask a New Question or answer this question.

GPT-4o mini · Answer