Unit 3 Review: Newton's Laws and Force in One Dimension

For an object to change velocity, it must have a(n) _________ acting on it.

• Force

• Area

• Effort

• Scalar

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A boat moving away from you as you jump out of it demonstrates which of Newton's Laws?

• Newton's First Law

• Newtons's Second Law

• Newton's Third Law

• Newton's Law of Gravity

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There are two cars involved in a head-on collision. One car has twice the mass of the other. The car with more mass hits the car with smaller mass with __________ force.

• No

• Less

• Equal

• More

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An elevator with a mass of 1500 kg accelerates upward at 1.63 m/s^2. What is the apparent weight of the elevator?

• 14700 N

• 12255 N

• 17145 N

• 2445 N

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A rocket weighs 19976.32 N. Its engines exert an upward force of 25 x 10⁶ N at liftoff. What is the mass of the rocket at liftoff?

• 2038.4 Kg

• 2.04 x 10⁶ Kg

• 204 kg

• There isn't enough information to tell

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What force is required to accelerate a 60 kg cart at 2.0 m/s² forward?

• 120.0 N

• 12.0 N

• 1200.0 N

• There isn't enough information to tell

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What is the magnitude of the force of tension in a rope that is supporting a 42kg bucket in the air?

• 41.2 N

• 412 N

• .42N

• There isn't enough information to tell

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What is the name of the missing force in this free body diagram?

• Tension Force

• Normal Force

• Weight Force

• Frictional Force

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If these boys are pulling with the same amount of force. What will happen?

• The boy on the left will win

• The boy on the right will win

• Neither will move

• Both will fall down

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A ball is dropped from an 80.0 m building. What is the ball's velocity after 3.00 s?

• 2.9 m/s

• 29.4 m/s

• 8.8 m/s

• 88.3 m/s

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