Which statement correctly compares his motion during the first 10 minutes to his motion during the last 10 minutes?
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1 point
He is going faster and in a different direction during the first 10 minutes than in the last 10 minutes.
He is speeding up during the first 10 minutes and slowing down during the last 10 minutes.
He is going slower and in a different direction during the first 10 minutes than in the last 10 minutes.
What does a horizontal line on a position-time graph indicate about the object?
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1 point
The object is accelerating.
The object has a position of zero.
The object remains still.
Which option is the force with the greatest magnitude?
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1 point
The force needed to lift a pencil
The force needed to lift a hairbrush
The force needed to lift a chair
Which option is the force with the greatest magnitude?
The force needed to lift a pencil
The force needed to lift a hairbrush
The force needed to lift a chair
The answer is: He is speeding up during the first 10 minutes and slowing down during the last 10 minutes.
The answer is: The object remains still.
The answer cannot be accurately determined without numerical values for the forces.
The force needed to lift a chair will likely have the greatest magnitude as it requires more force to lift a heavier object.
A box is against a wall. A person pushes on the box, but the box does not move. Is this situation an example of a force?
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1 point
No, this is not an example of a force because the box did not move.
Yes, this is an example of a force because a force is a push or pull.
No, this is not an example of a force because a force pulls an object.
Yes, this is an example of a force because a force is a push or pull. In this situation, the person is applying a force to the box, but the force is countered by the force of friction between the box and the wall, which prevents the box from moving.
When you trip, your foot stops, but your body continues to move forward. Which statement best explains why this happens?
The unbalanced force that stops your foot pulls your body forward.
An unbalanced force pushes your body forward.
An unbalanced force stops your foot but does not act on the rest of your body.