Question

Question 1 A)A child is on a playground they start to slide down a large slide. At what point is the child in dynamic equilibrium with the slide?(1 point) Responses When the child pushes themselves down the slides. When the child pushes themselves down the slides. As the child is in motion as they are sliding down. As the child is in motion as they are sliding down. When the slide ends and the child has stopped moving . When the slide ends and the child has stopped moving . The child will not reach dynamic equilibrium. The child will not reach dynamic equilibrium. Question 2 A)Which statement correctly defines dynamic equilibrium? (1 point) Responses Forces acting on a object are balanced and the object stays in rest. Forces acting on a object are balanced and the object stays in rest. Forces acting on a object are unbalanced and the object stays in rest. Forces acting on a object are unbalanced and the object stays in rest. Forces acting on a object are balanced and the object stays in motion. Forces acting on a object are balanced and the object stays in motion. Forces acting on a object are unbalanced and the object stays in motion. Forces acting on a object are unbalanced and the object stays in motion. Question 3 A)While you push a box you begin to decrease the force you are exerting on the box. When will the box reach static equilibrium?(1 point) Responses When Fpush=FfrictionFpush=FfrictionWhen cap f sub p u s h is equal to cap f sub f r i c t i o n When Fpush>FfrictionFpush>Ffriction When cap f sub p u s h is greater than cap f sub f r i c t i o n When Fpush<FfrictionFpush<Ffriction When Fpush<FfrictionFpush<Ffriction The box will not reach static equilibrium. The box will not reach static equilibrium. Question 4 A)What is the fastest motion that can be measured in any frame of reference? (1 point) Responses 300,000 km/s 300,000 km/s 186,000 m/s 186,000 m/s 186,000 km/s 186,000 km/s 300,000 m/s 300,000 m/s Question 5 A) Two people are on a train that is moving at 10 m/s north. They are walking 1 m/s south relative to the train. Relative to the ground, their motion is 9 m/s north. Why are we able to use these motions to describe the motion relative to the ground? (1 point) Responses The motion of everything in the Universe besides light can be described in this way. The motion of everything in the Universe besides light can be described in this way. If one object is moving much slower than the speed of light, its speed can be added to that of another object. If one object is moving much slower than the speed of light, its speed can be added to that of another object. The people are moving much slower than the speed of light so the ground acts as a frame of reference. The people are moving much slower than the speed of light so the ground acts as a frame of reference. As long as the frame of reference is stationary, all motion can be described in this way. As long as the frame of reference is stationary, all motion can be described in this way.

Answer 1

Here are the best responses to each of your questions:

Question 1 A) At what point is the child in dynamic equilibrium with the slide?

• Response: When the slide ends and the child has stopped moving.

Question 2 A) Which statement correctly defines dynamic equilibrium?

• Response: Forces acting on a object are balanced and the object stays in motion.

Question 3 A) When will the box reach static equilibrium?

• Response: When Fpush = Ffriction (When the force you push with is equal to the force of friction).

Question 4 A) What is the fastest motion that can be measured in any frame of reference?

• Response: 300,000 km/s.

Question 5 A) Why are we able to use these motions to describe the motion relative to the ground?

• Response: If one object is moving much slower than the speed of light, its speed can be added to that of another object.

Feel free to ask if you need additional explanations or have more questions!