7.1 over Forces

Which statement illustrates Newton’s first law?

• A ball rolling across the floor eventually slows down.
• A stone will not move unless something pushes or pulls it.
• As a car comes to a stop, the passengers continue to move forward.
• All of the above

Newton's third law states that for every action force there is a(n) ___________ and ____________ reaction force.

• gravity and air resistance
• forward and backward
• friction and gravity
• equal and opposite

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NGSS.MS-PS2-1

What force causes a rolling ball to gradually slow down?

• acceleration
• friction
• a balanced force

Which object has the greatest inertia?

• a tennis ball (0.2 kg)
• a bowling ball (2.0 kg)
• a beach ball (0.1 kg)

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NGSS.MS-PS2-2

Calculate the net force.

• 1 N to right
• 1 N to left
• 7 N to right
• 3 N to left

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NGSS.MS-PS2-2

Calculate the net force.

• 37 N to left
• 37 N to right
• 7 N to right
• 7 N to left

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NGSS.MS-PS2-2

NGSS.MS-PS2-1

State Newton's 1st Law of Motion.

State Newton's 2nd Law of Motion

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State Newton's 3rd Law of Motion.

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A push or pull describes

• a force
• friction
• drag

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NGSS.MS-PS2-2

NGSS.MS-PS2-1