Exploring Motion and Forces Quiz

Which law states that an object at rest will remain at rest unless acted upon by an unbalanced force?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Law of Conservation of Energy

What is the unit of force in the International System of Units (SI)?

• Joule

• Newton

• Watt

• Pascal

Which of the following is an example of potential energy?

• A moving car

• A stretched bow

• A falling rock

• A spinning wheel

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Which simple machine is used to lift a load by applying force at one end?

• Pulley

• Lever

• Inclined plane

• Wheel and axle

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If the mass of an object is doubled while its velocity remains the same, what happens to its kinetic energy?

• It is halved

• It remains the same

• It is doubled

• It is quadrupled

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A student observes that when a ball is dropped from a height, it bounces back to a lower height each time. Which statement best explains this observation in terms of energy conservation?

• The ball gains energy with each bounce.

• Some energy is lost to the surroundings as heat and sound.

• The ball's mass decreases after each bounce.

• The ball's potential energy increases after each bounce.

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