Crash Course Physics

A push or pull acting on an object is called ___

• a lever
• a pusher
• a force
• a puller

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Everything would fly off into space, without ___

• frictional forces
• french fries
• water
• the force of gravity

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Which English scientist was the first person to seriously study gravity?

• Michael Faraday
• Charles Darwin
• Albert Einstein
• Isaac Newton

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What event led to an "Aha!" moment for Sir Isaac Newton? 

• He was hit by a falling apple
• He awoke from a deep sleep
• He had a dream about gravity
• He ate a delicious apple

Which type of objects are pulled toward Earth?

• only apples
• only light objects
• only heavy objects
• all objects

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If you are holding an apple, a bowling ball, and a feather, then let go of them, ___

• they're all going down
• the feather will stay put
• only the bowling ball falls
• only the heavy objects fall

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Sir Isaac determined that "what goes up ___"

• isn't affected by gravity
• stays up
• must come down
• goes into orbit

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A thrown ball will go up or sideways for a little bit ___

• then keep going
• then come back
• while it's not affected by gravity
• then will fall to the ground

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When we talk about gravity, 'up' just means ___

• towards the North Pole
• away from the South Pole
• away from the Earth
• toward the Earth

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What is the force that pulls objects down toward the Earth?

• gravity
• friction
• air resistance
• static electricity

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