Forces and Newton's Laws

Which diagram represents balanced forces?

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Which pair of forces will cause the object to move to the right?

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Which type of friction do you use when you put on the brakes to stop a bike?

• static friction

• stopping friction

• rolling friction

• sliding friction

Why does engine oil help prevent an engine from overheating?

• It causes chemical reactions that absorb energy

• It reduces friction between moving parts

• It has a higher melting point than metal

• It makes the engine run more slowly

You would weigh less on the moon than Earth because

• you would have less mass on the moon

• the moon has weaker gravity than Earth

• the moon has a thinner atmosphere than Earth

• the moon is closer to the Sun than Earth

Albert Einstein was the first person to show that gravity is

• exerted by all objects on all other objects

• stronger between objects with greater mass

• stronger between objects that are closer together

• caused by curves in space and time around massive objects

Examples of objects that make use of elastic force include

• hair scrunchies

• pogo sticks

• trampolines

• all of these

How much an objects motion changes when force is applied to it depends on the strength of the force and the object's

• size

• mass

• volume

• velocity

Why is force a vector?

• It causes objects to move

• It has size and direction

• It can be measured

• Yoda made it so

One Newton is defined as the amount of force that causes

• a weight of 1 pound to reach a speed of 1 m/s

• a mass of 1 kilogram to accelerate at 1 m/s²

• an object to increase its velocity to 1 m/s²

• any stationary object to start moving