Physics Unit Review

All vehicles are moving at 45 km/hr. Which vehicle is accelerating?

• The minivan

• The sedan

• The pickup truck

What is the net force acting on the train?

• 3 N

• -3 N

• 7 N

• - 7 N

Answer explanation

The forces are moving in opposite directions, so they are subtracted.The net force is moving to the left, so the answer is negative.

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NGSS.MS-PS2-2

Joe pushes the box with a force of 12 N to the right and Polly pushes the box with a force of 6 N to the left. Which of the following shows the correct force diagram for the scenario?

• 
• 
• 
• 

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Match the scenario to its graph

• You quickly go to school, then stop. Then you slowly go to work.

• 
• The ice cream truck brakes for the children to catch up

• 
• You walk slowly to school. Stay at school. Walk quickly home.

• 
• A moving bus stopped because it had a flat tire.

• 
• A car traveling at a constant speed

• 

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NGSS.MS-PS3-1

A brick weighing 5 N is placed on a chair that weighs 10 N. What is the normal force pushing up from the ground?

• 0 N

• 5 N

• 10 N

• 15 N

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

As mass increases, acceleration _________________

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NGSS.MS-PS2-2

The boy pictured is pulling the dog’s leash towards him; however, the boy and the dog are moving in the direction of the dog. Which of the following best describes the reason for this?

• The forces are balanced because the dog is stronger

• The forces are unbalanced because the boy’s force is stronger

• The forces are unbalanced because the dog’s force is stronger

• The forces are balanced because the net force is zero.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which graph shows a faster speed?

• 
• 

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NGSS.MS-PS3-1

A toy truck has a mass of 1 kg. Daniel pushes the truck across the carpet with a force of 4 N. Calculate the acceleration of the truck.

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NGSS.MS-PS2-2

An unbalanced force causes an object to

• accelerate or change velocity

• remain stationary

• maintain a constant velocity

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NGSS.MS-PS2-2