Forces & Newton's Laws Test

A student pushes a 12 N book to the right with a force of 10 N. The book experiences a frictional force of 3 N. The free-body force diagram below represents the forces acting on the book.

What is the net force acting on the book?

• 7N

• 11N

• 13N

• 37N

Tags

NGSS.MS-PS2-2

An unbalanced force of 10 N is applied to an object of mass 4.0 kilograms. Calculate the acceleration of the object?

• 1.2 m/s²

• 2.5 m/s²

• 14 m/s²

• 40. m/s²

Tags

NGSS.MS-PS2-2

A student pushed a 10.0 kg box across a level, frictionless floor with an acceleration of 5.00 m/s². Calculate the force the student applied to the box?

• 0.500 N

• 2.00 N

• 15.0 N

• 50.0 N

Tags

NGSS.MS-PS2-2

The table below shows the relationship between the force on an object and the object’s resulting acceleration.

What is the mass of the object? g

• 1 kg

• 3 kg

• 12 kg

• 27 kg

Tags

NGSS.MS-PS2-2

The diagram below shows an 80 kg ice skater applying a force of 10 N to a 60 kg ice skater.

Which statement best describes the results of applying the 10 N force?

• The skaters will not move at all.

• The skaters will accelerate away from each other at the same rate.

• The skaters will accelerate away from each other, but the 60 kg skater will accelerate at a faster rate.

• The 60 kg skater will accelerate away from the 80 kg skater, and the 80 kg skater will remain stationary.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Use the diagram below to answer the question.

Brennan is traveling in a car at a constant speed. He quickly applies his brakes and stops to avoid an accident. Brennan’s body continues to move forward and is stopped by the seat belt. Why?

• an object in motion remains in motion unless acted on by a force

• for every action there is an opposite equal reaction

• when mass increases a greater force is needed to accelerate the object

• the law of conservation of mass

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A large rock has a mass of 750 kg. Calculate the weight of the rock. (g=9.8 m/s²)

• 9.8 lbs

• 76.53N

• 750 n

• 7,350 N

Tags

NGSS.MS-PS2-4

You and a friend are moving a box.

According to the diagram, how will the forces on the box affect its movement?

• The net force is 0 N, the box will turn over.

• The net force is 0 N, the box will not move.

• The net force is 50 N to the right, the box will move towards Person A.

• The net force is 50 N to the left, the box will move towards Person B.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Use the picture below to answer the question.

Two metal spheres are suspended on wires so that they hang next to each other, touching slightly. Sphere X is raised to a certain height and released.

Which of the following results would provide support for Newton’s third law?

• Sphere Y is moving a distance too small to be measured.

• Sphere Y is moving to half the original height of Sphere X.

• Sphere Y is moving to the same original height as Sphere X.

• Sphere Y is moving to twice the original height of Sphere X.

Tags

NGSS.MS-PS2-1

The table below provides information on the gravitational force of falling objects of different masses.

What is the most reasonable prediction for the gravitational force of a falling object with a mass of 3.0 kg?

• 27 N

• 29.4 N

• 33.1 N

• 36.8 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4