Force and Equilibrium

A force of 20 N is applied to a red ball with a mass of 4 kg. An equal force is applied to a blue ball with mass of 8 kg. Which ball will accelerate faster?

• red ball

• blue ball

• red and blue will accelerate equally

• green ball

A force of 50 N is applied to a 40 kg object. How fast will the object accelerate?

• 1.25 m/s²

• 0.867 m/s²

• 4.32 m/s²

• 0.75 m/s²

A force of unknown amount causes a 12 kg object to accelerate at a rate of 12 m/s². What was the amount of the force?

• 144 N

• 42.4 N

• 323 N

• 240 N

A force of 40 N is applied to a horse, causing it to accelerate, at a rate of 8 m/s². What is the mass of the horse?

• 5 kg

• 15 kg

• 25 kg

• 40 kg

In your own words, describe Newton's First Law of Motion.

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In your own words, explain Newton's Second Law of Motion.

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In your own words, summarize Newton's Third Law of Motion.

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If a 7 kg object is forced to accelerate at a rate of 21 m/s², how much force was applied to it?

• 3 N

• 14 N

• 35 N

• 147 N

If a force of 65 N is applied to a 10 kg ball, how fast will the ball accelerate?

• 6.5 m/s²

• 3.3 m/s²

• 16.9 m/s²

• 6506.5 m/s²

If a 33 kg ball is kicked and experiences an acceleration of 3 m/s², how much force was applied by the kick?

• 99 N

• 30 N

• 1.1 N

• 90 N