Physics Regents Review

Which pair of quantities represent scalar quantities?

• Displacement and Velocity

• Displacement and Time

• Distance and Velocity

• Distance and Time

A sailboat on a lake sails 40. meters north and then sails 40. meters due east. Compared to its starting position, the new position of the sailboat is

• 40 m due east

• 40 m due north

• 57 m northeast

• 80 m northeast

A ball is dropped from a cliff. What choice best describes the velocity and acceleration of the ball as it falls freely?

• Both velocity and acceleration are zero

• Velocity increases and the acceleration stays the same

• Both velocity and acceleration are increasing

• Velocity decreases and the acceleration stays the same

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NGSS.HS-PS2-4

How would the mass and weight of an object on the Moon compare to the mass and weight of the same object on Earth?

• Mass and weight would be less on the Moon.

• Mass would be the same but the weight would be less on the Moon.

• Mass would be less on the moon but the weight would be the same.

• Mass and weight would both be the same on the Moon.

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An object is moving with constant speed in a circular path. The object’s centripetal acceleration remains constant in

• Magnitude, only

• Direction, only

• Both magnitude and direction

• Neither magnitude or direction

As shown in the diagram below, a rope attached to a 500.-kilogram crate is used to exert a force of 45 newtons at an angle of 65 degrees above the horizontal. The horizontal component of the force pulling the crate forward must be

• 19 N

• 41 N

• 210 N

• 450 N

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A 5.0-kilogram box is sliding across a level floor. The box is acted upon by a force of 27 newtons east and a frictional force of 17 newtons west. What is the magnitude of the acceleration of the box?

• 0.5 m/s^2

• 2.0 m/s^2

• 8.8m/s^2

• 10 m/s^2

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The velocity-time graph shows how the velocity of a car changes with time. What is the magnitude of the car's acceleration?

• 0 m/s^2

• 2 m/s^2

• 4 m/s^2

• 20 m/s^2

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The diagram below represents a 2.0-kilogram toy car moving at a constant speed of 3.0 meters per second counterclockwise in a circular path with a radius of 2.0 meters. At the instant shown in the diagram, the centripetal force acting on the car is

• 4.5 N north

• 4.5 N east

• 9 N north

• 9 N east

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A student wishes to record a 7.5-kilogram watermelon colliding with the ground. Calculate approximately how far the watermelon must fall freely from rest so it would be traveling at 29 meters per second the instant it hits the ground.

• 2.9 m

• 9.8 m

• 21.5 m

• 43 m

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