Unit 2 8th grade TEST Force and Motion

A 5kg object is acted upon by a constant force of 20 Newtons. What is the acceleration of the object?

• 4 m/s²

• 5 m/s²

• 6 m/s²

• 3 m/s²

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If you have a net force of 0N, you can be either ____________ moving or moving at a ______________ rate.

• not, changing

• not, constant

• constantly, changing

• constantly, not

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Calculate the net force of an object with a constant velocity of 5m/s and a weight of 10 Kg.

• 20 N

• 10 N

• 5 N

• 50 N

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Which ball has the LEAST amount of acceleration?

• Ball 1

• Ball 2

• Ball 3

• All have the same

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What is Newton’s 1st Law of Motion?

• An object in motion stays in motion unless acted upon by an external force.

• Force equals mass times acceleration.

• For every action, there is an equal and opposite reaction.

• Energy cannot be created or destroyed.

What is Newton’s 2nd Law of Motion?

• An object in motion stays in motion unless acted upon by an external force.

• Force equals mass times acceleration.

• For every action, there is an equal and opposite reaction.

• Energy cannot be created or destroyed.

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NGSS.HS-PS2-1

What is Newton’s 3rd Law of Motion?

• An object in motion stays in motion unless acted upon by an external force.

• Force equals mass times acceleration.

• For every action, there is an equal and opposite reaction.

• Energy cannot be created or destroyed.

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Give an example of Newton’s 1st Law of Motion.

• A book resting on a table.

• A car accelerating.

• A rocket launching.

• A ball bouncing.

Give an example of Newton’s 2nd Law of Motion.

• A book resting on a table.

• A car accelerating.

• A rocket launching.

• A ball bouncing.

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A ball has a push force of 10 N and a friction force of 5 N. If the ball weighs 0.5 Kg, how much will it accelerate?

• 10 m/s²

• 5 m/s²

• 1 m/s²

• 0.5 m/s²

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NGSS.HS-PS2-1