Physics Quiz

The force of gravity on an object depends primarily on the object's:

• density

• mass

• momentum

• volume

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which of the following is certain to change as a ball accelerates?

• mass of the ball

• inertia of the ball

• velocity of the ball

• force acting on the ball occasionally

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NGSS.MS-PS2-2

Two forces act on the 2 kg box shown below. What is the net force acting on the box?

• 10 N to the right

• 10 N to the left

• 2 N to the right

• 2 N to the left

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NGSS.MS-PS2-2

The illustration below shows a 2-ton elephant balancing on a tree stump. Which of the following statements must be accurate?

• The weight of the tree stump is greater than 2 tons.

• A 4-ton force on the ground spreads out in all directions.

• The tree stump is exerting a 2-ton force upward on the elephant.

• The downward force on the ground under the tree stump is 4 tons.

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NGSS.MS-PS2-4

A 1500 kg car increases its speed by 2 m/s² for each second of travel. What is the net force acting on the car?

• 750 N

• 1500 N

• 3000 N

• 6000 N

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NGSS.MS-PS2-2

A hot air balloon exerts a force of 1200 N while lifting a load of 800 N. Which free-body force diagram depicts the forces involved?

• 
• 
• 
• 

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

A student is standing on a skateboard that is not moving. The total mass of the student and the skateboard is 50 kilograms. The student throws a ball with a mass of 2 kilograms forward at 5 m/s. Assuming the skateboard wheels are frictionless, how will the student and the skateboard move?

• forward at 0.4 m/s

• forward at 5 m/s

• backward at 0.2 m/s

• backward at 5 m/s

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NGSS.MS-PS2-2

NGSS.MS-PS2-1

The tendency of a stationary object to resist being put into motion is known as

• acceleration.

• inertia.

• weight.

• velocity.

An upward force of 150 N is applied to a box weighing 70 N. Which of the following is the free-body force diagram for this situation?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

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NGSS.MS-PS2-2

One 7.0 kg bowling ball is lifted to a storage shelf 1.0 m above the floor. A second 7.0 kg ball is lifted to a storage shelf 2.0 m above the floor. Which of the following best explains why the measured force of gravity on each ball is nearly identical?

• The final potential energy of each ball increased.

• The amount of work required to lift each ball is identical.

• The distance of each ball from Earth's center of mass is almost identical.

• The gravitational force of each ball on the other cancels out the force of Earth's gravity.

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NGSS.MS-PS2-4