PS2

Look at the picture.  Is the force of gravity on the boy a push or a pull? 

• Pull

• Push

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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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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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Which is a use of air resistance?

• swimming in a pool

• opening a parachute

• falling asleep

• going to the moon

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Gravity on Mars surface is much lower than it is here on Earth. This is because the mass is __________than Earth.

• less

• more

• the same

As distance between objects increases the pull of gravity...

• increases 

• decreases 

• Stays the same 

Which statement is true about gravity?

• Gravity affects all matter on Earth.

• Gravity acts only on objects that are touching.

• Gravity is a force that repels one object from another.

• Gravity is a force that only affects large objects.

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Imagine that there was no gravity on Earth. What would most likely happen to a piece of paper or pen on your desk?

• Nothing

• They would stick to your desk.

• They would float off your desk.

• They would fall to the floor.

Object's are pulled towards the Earth's -

• atmosphere.

• center.

• mountains.

• surface.

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Newton’s Second Law of Motion states that

•  for every action there is an equal and opposite reaction

• an object at rest will remain at rest and an object in motion will stay in motion unless acted upon by an unbalanced force

• force = mass X acceleration