Physics Review

A force is a -

• push or pull

• only a push

• only a pull

• none of the above

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How much force is needed to accelerate a 3kg skateboard 5m/s².

• 8N

• 1.6N

• 0.6N

• 15N

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How much force is needed to accelerate a 25kg bowling ball 2m/s².

• 50N

• 5N

• 12.5N

• 100N

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If a 2kg bird is pushed by the wind with a force of 2N, how much does the bird accelerate?

• 1m

• 2m/s²

• 4m/s²

• 1m/s²

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Newton's second law of motion describes the relationship between force, mass, and acceleration. Which of the following correctly describes this relationship?

• m=F/a

• F=ma

• a= F/m

• All of the above

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What is the acceleration of a 50kg object pushed with a force of 500 Newtons?

• 100m/s²

• 25,000m/s²

• 10m/s²

• 25m/s²

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NGSS.MS-PS2-2

A 50kg skater pushed by a friend accelerates 5m/sec². How much force did the friend apply?

• 45N

• 15N

• 10N

• 250N

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A force of 250N is applied to an object that accelerates at a rate of 5m/sec². What is the mass of the object?

• 100kg

• 1,250kg

• 50kg

• 5kg

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8th grade science classes are playing tug of war. Milburn's room pulls to the left with a force of 50N. Matte's room pulls to the right with a force of 45N. What is the net force? And who won?

• 5N right. Matte's class won.

• 5N left. Milburn's class won.

• 95N right. Matte's class won.

• 95N left. Milburn's class won.

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NGSS.MS-PS2-2

Which of the following correctly represents an unbalanced force?

• A book sitting on a desk.

• A ball moving in a constant speed in the same direction.

• While doing a mannequin challenge, Reed moves quickly to swat a bug that lands on his nose.

• A picture hanging on the wall in a classroom.

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