Physics Review!

The figure represents a ball that starts from rest at point A, rolls down to ground level (point D), and then up to point G. Which statement best describes the energy transformation of the balls as it goes from point D to point G?

• Kinetic energy is converted into potential energy.

• Potential energy is converted into kinetic energy.

• Both the kinetic energy and potential energy remain constant.

• There is not enough information in the diagram.

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

A car moves at a constant speed in a clockwise direction around a circular path of radius r, as shown in the diagram. What is the direction of the acceleration when the car is in the position shown in the diagram?

• East

• West

• North

• South

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NGSS.HS-PS2-1

The table shows the mass, velocity and height of four different objects. Which object has the most mechanical energy?

• Object A

• Object B

• Object C

• Object D

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NGSS.HS-PS3-2

A block with a mass of 5.0 kg is pushed on a frictionless surface by applying a horizontal force of 80.0 N. The block starts from rest, and its final velocity is 12.6 m/s. How much work is done on the block?

• 32 J

• 397 J

• 800 J

• 992 J

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NGSS.HS-PS2-1

NGSS.HS-PS3-1

John sees Hua running towards him at 11 m/s. While running, Hua throws a ball to John at 5 m/s.

What is the speed of the ball as observed by John?

• 5 m/s

• 6 m/s

• 16 m/s

• 55 m/s

Two objects with masses mA and mB are separated by a distance, d, and exert a force, F, on

each other. What new force will exist between these objects if d is doubled as shown in the diagram?

• F/2

• F/4

• 2F

• 4F

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NGSS.HS-PS2-4

If the mass of a balloon is 300 kg and the lift force provided by the atmosphere is 3300 N, what is the net force on the balloon?

• Upward, 360 N

• Downward, 300 N

• Toward the north, 300 N

• Toward the east, 360 N

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NGSS.HS-PS2-1

A mass of 5 kg slides across a frictionless table with an initial velocity of 10 m/s. The wind starts to blow in the direction the mass is moving causing it to accelerate at a constant rate. After 2 seconds, the mass is moving at a velocity of 15 m/s. What is the acceleration of the mass?

• 12.5 m/s²

• 7.5 m/s²

• 5.0 m/s²

• 2.5 m/s²

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NGSS.HS-PS2-1

An object moves in a straight line at a constant velocity of 1 m/s as shown in the velocity-

time graph. What position-time graph is represented by the motion indicated in the velocity-time graph?

• 
• 
• 
• 

A force of 24.0 N was used to push an object weighing 29.5 N along a flat frictionless horizontal surface. What is the magnitude of the acceleration achieved by the object?

• 0.8 m/s²

• 1.2 m/s²

• 5.5 m/s²

• 8.0 m/s²

Tags

NGSS.HS-PS2-1