The graph below shows the motion of a student that is walking and texting.

Question

Use the time and distance graph to match up the motion statements with the events on the graph.



(3 points)
Sally walked at a steady speed for 5 meters:

Sally returned to her starting point:

Sally stood still:

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Answer 1

To match the motion statements with the events on the graph, let's analyze the possible interpretations of the statements based on typical graph features.

1. Sally walked at a steady speed for 5 meters: This event would be represented by a straight diagonal line on the graph indicating a constant speed over a distance. You would look for a segment of the graph that shows a straight line where the distance increases uniformly over time for a duration leading to 5 meters.

2. Sally returned to her starting point: This would typically be represented on the graph by a segment where the distance decreases, suggesting that she walked back to her original position. Look for a downward slope that returns to the starting point on the distance axis.

3. Sally stood still: This would be shown by a horizontal line on the graph where distance does not change over time. Locate a flat section in the graph where there is no increase or decrease in distance for a period.

Without seeing the specific graph, I can't tell you the exact matches, but you would look for those characteristics in the graph to match each statement to the corresponding event. If you can provide a description of the graph or its key points, I would be happy to help further!

Answer 2

hen you are describing motion, what is a reference point?



(1 point)
Responses

a stationary object used as comparison
a stationary object used as comparison

the direction in which an object moves
the direction in which an object moves

where an object in motion stops
where an object in motion stops

a moving object used as comparison

Answer 3

A reference point is best described as a stationary object used as comparison. It provides a way to determine if an object is in motion by comparing its position to that of the reference point.

Answer 4

Select the three situations in which unbalanced forces are acting on the objects.



(3 points)
Responses

A basketball gaining speed as it rolls down a ramp.
A basketball gaining speed as it rolls down a ramp.

A car moving at a constant speed in a straight direction.
A car moving at a constant speed in a straight direction.

A rollercoaster slowing down as it nears the top of a hill.
A rollercoaster slowing down as it nears the top of a hill.

A race car moving at a constant speed around a circular track.
A race car moving at a constant speed around a circular track.

A motorcycle parked in a driveway.
A motorcycle parked in a driveway.

Answer 5

The three situations in which unbalanced forces are acting on the objects are:

1. A basketball gaining speed as it rolls down a ramp.

   • This indicates that there is a net force acting on the basketball, causing it to accelerate.

2. A rollercoaster slowing down as it nears the top of a hill.

   • This shows that there is an unbalanced force acting on the rollercoaster, causing it to decelerate.

3. A race car moving at a constant speed around a circular track.

   • Although the car is moving at a constant speed, it is changing direction, which means there is an unbalanced force acting on it (centripetal force) to keep it moving in a circle.

The other two scenarios (the car moving at a constant speed in a straight direction and a motorcycle parked in a driveway) involve balanced forces, as there is no change in motion.

Answer 6

A goat hops onto a skateboard.



Select the boxes to identify the net force for each stage of the skateboards movement.

Note: Not all options may be used. Options may be used more than once.



(4 points)
Net Force is Zero
Slows down

Moves at a constant speed

At rest

Begins to move forward

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Answer 7

To identify the net force for each stage of the skateboard's movement after a goat hops onto it, we can categorize the movements as follows:

1. At rest:

   • Net Force is Zero
     (The skateboard is not moving initially.)

2. Begins to move forward:

   • Begins to move forward
     (There is an unbalanced force acting on it due to the goat hopping onto it, causing it to accelerate.)

3. Moves at a constant speed:

   • Net Force is Zero
     (When the skateboard moves at a constant speed, the forces acting on it are balanced.)

4. Slows down:

   • Slows down
     (This indicates that there is an unbalanced force acting against the motion of the skateboard, causing it to decelerate.)

So you can select the options accordingly based on these descriptions.

Answer 8

What is the net force in the scenario below?

(1 point)
Responses

0N to the right
0N to the right

450N to the left
450N to the left

900N to the right
900N to the right

450N to the right
450N to the right
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Answer 9

To determine the net force in the scenario, we would need specific information about the forces acting on the object, including their magnitudes and directions.

Since that information is not provided in your question, I can guide you through how to arrive at the answer:

1. If forces acting on the object are balanced (e.g., 450N to the left and 450N to the right), then the net force would be 0N.
2. If one force is greater than the opposing forces (e.g., if there is 900N to the right and only 450N to the left), then you would subtract the smaller force from the larger one to find the net force in the direction of the larger force.

Assuming you have details about the forces involved in your scenario, please provide that context so I can help you identify the correct net force from the options given.

Answer 10

Part A: Choose the 3 statements below that are TRUE about the forces in the image below.

*Make note of your answers selected here. You will need them for Part B

(1 point)
Responses

The net force is 15 N
The net force is 15 N

The forces are balanced
The forces are balanced

The net force is 0N
The net force is 0N

The forces are unbalanced
The forces are unbalanced

The net force is 30 N
The net force is 30 N

There is no change in motion
There is no change in motion
Question 2
Part B:

Explain your answers to Part A. (3 points)

Are the forces balanced? How do you know?
Is the box in motion? Why or why not?
What is the net force? How do you know?
(3 points)

Answer 11

To select the three true statements regarding the forces based on your provided options, let's break them down. Since we don't have the actual image to analyze, I will guide you through typical scenarios involving forces.

Part A: True Statements

1. The forces are unbalanced (if there is a net force being exerted).
2. The net force is 15 N (if this value has been calculated based on the forces acting).
3. The net force is 0N (if the box is at rest and experiencing equal forces from opposing directions).

Depending on the scenario, you could pick two of the above options, but not both about the net force simultaneously.

Part B: Explain Your Answers

1. Are the forces balanced? How do you know?

   • Answer Example: The forces are balanced if the object is at rest or moving at a constant speed. If the forces acting on the object are equal and opposite, then the sum of the forces is zero, indicating balance. If there is a net force (like 15 N), then the forces are unbalanced, meaning one force is greater than the other.

2. Is the box in motion? Why or why not?

   • Answer Example: If the net force is not zero, then the box is likely in motion, accelerating in the direction of the net force. If the net force is zero and there are no other forces acting (like friction), the box would remain at rest, signifying a lack of motion.

3. What is the net force? How do you know?

   • Answer Example: The net force can be determined by summing the forces acting on the object. If one force is larger than the other, the net force will equal the difference between the two (e.g., 15 N in favor of the larger force). If the forces cancel each other out, the net force is 0N, indicating the object will not accelerate.

Conclusion

In scenarios involving forces, the state of motion and whether forces are balanced or unbalanced is crucial for understanding the dynamics of the system in question.