Newton's Laws and Forces

A book rests on an inclined plane as shown above.

Which statement correctly identifies the book’s weight and the normal force on the book?

• Vector B is the weight of the book and vector D is the normal force on the book.

• Vector A is the weight of the book and vector C is the normal force on the book.

• Vector D is the weight of the book and vector B is the normal force on the book.

• Vector C is the weight of the book and vector A is the normal force on the book.

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NGSS.HS-PS2-1

The free-body diagram below shows the forces acting on an elevator.

Based on this diagram which statement below could describe the motion of the elevator?

• speeding up as it is moving upward

• going a constant speed as it is moving downward

• slowing down as it is moving upward

• slowing down as it is moving downward

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NGSS.HS-PS2-1

NGSS.HS-PS2-4

The diagram of a block is shown.

If placed on a table, what is the net normal force of the block?

• 6 N

• 4 N

• 8 N

• 3 N

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NGSS.MS-PS2-2

A glass pendant is suspended from a string on a car’s rear view mirror. The car begins a constant acceleration forward, and the pendant makes a small angle from the vertical. Which free-body diagram correctly shows all of the forces on the pendant?

• 
• 
• 
• 

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NGSS.HS-PS2-1

What is the amount of force required to accelerate a 20 kg object to 5 m/s²?

• .25 N

• 10 N

• 100 N

• 4 N

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NGSS.HS-PS2-1

A brick is resting on a level, smooth surface. When a student applies a horizontal force of 5 N to the brick, the force of friction on the brick is also 5 N. Which statement best describes the effect of these two forces on the brick?

• The net force on the brick is 10 N, and the brick remains at rest.

• The net force on the brick is 10 N, and the brick begins to move.

• The net force on the brick is 0 N, and the brick begins to move.

• The net force on the brick is 0 N, and the brick remains at rest.

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NGSS.HS-PS2-1

Which of the following best explains Newton's Second Law?

• Masses accelerate, which generates forces.

• The acceleration produced is a result of the force applied to a mass.

• Forces are a result of the acceleration applied to a mass.

• Objects with a constant rate of motion include those with a net force.

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NGSS.HS-PS2-1

During a fall, why does a skydiver reach a terminal (constant) velocity and not continue to accelerate?

• The force of the skydiver on Earth is equal and opposite to the force of Earth on the skydiver.

• The downward weight of the skydiver equals the upward force of air resistance on the skydiver.

• No forces act on the skydiver during the time the terminal velocity is reached.

• The downward force of air resistance on the skydiver equals the upward force of the weight of the skydiver.

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NGSS.HS-PS2-1

Stacey sits in a rolling chair. She throws a heavy ball forward and her chair she is sitting in rolls backward.

Which vectors best illustrate the forces involved in this phenomenon?

• 
• 
• 
• 

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NGSS.HS-PS2-2

Four forces act on a box as shown.

What is the magnitude of the net force on the box?

• 22 N

• 50 N

• 100 N

• 5 N

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NGSS.HS-PS2-1