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
The force needed to lift a chair.
Yes, this is an example of a force because a force is a push or pull. The person is applying a force on the box, even though it is not moving.
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.
When you trip, your foot stops, but your body continues to move forward. Which statement best explains why this happens?
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1 point
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.
An unbalanced force stops your foot but does not act on the rest of your body.
Which is a good description of kinetic energy?
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1 point
Conserved energy
Energy of motion
Stored energy
Energy of motion.
A person throws a ball up into the air. At which point in its path will the ball have the greatest potential energy?
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1 point
When the ball is still rising
When the ball reaches its highest point
When the ball leaves the person’s hand
When the ball hits the ground
When the ball reaches its highest point.
This image of a roller coaster is designed to show important information about potential and kinetic energy. One of these pieces of information is incorrect. Which information is wrong, and why?
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1 point
The roller coaster would only have kinetic energy at the point labeled “gravitational potential energy and kinetic energy.”
The spot with the “maximum kinetic energy” should be on the lowest point of the roller coaster, at the far left side on the bottom.
The roller coaster would only have potential energy at the point labeled “gravitational potential energy and kinetic energy.”