Exam Review: Forces

Which of the following statements best describes Newton's First Law of Motion?

• An object in motion will eventually stop due to friction.

• An object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by an external force.

• The acceleration of an object is directly proportional to the net force acting on it.

• For every action, there is an equal and opposite reaction.

Tags

NGSS.MS-PS2-2

Which of the following is an example of Newton's Third Law of Motion?

• A book resting on a table.

• A car accelerating on a highway.

• A rocket launching into space.

• A ball rolling down a hill.

Tags

NGSS.MS-PS2-1

Explain why passengers in a car lurch forward when the car suddenly stops.

• Due to the car's acceleration.

• Because of inertia, the passengers continue moving forward.

• Because of the car's velocity.

• Due to the gravitational pull.

A 10 kg object is subjected to a net force of 50 N. What is the acceleration of the object?

Tags

NGSS.MS-PS2-2

Which of the following best describes inertia?

• The tendency of an object to change its state of motion.

• The resistance of an object to any change in its state of motion.

• The force required to move an object.

• The speed of an object in motion.

Tags

NGSS.MS-PS2-2

Discuss how Newton's Second Law of Motion applies to a car accelerating on a highway.

• The car's mass increases as it accelerates.

• The car's acceleration is inversely proportional to the net force applied.

• The car's acceleration is directly proportional to the net force applied and inversely proportional to its mass.

• The car's velocity remains constant.

Tags

NGSS.MS-PS2-2

If a force of 10 N is applied to a 2 kg object, what is the resulting acceleration?

Tags

NGSS.MS-PS2-2

Which of the following scenarios is an application of Newton's Third Law of Motion?

• A person pushing against a wall and the wall pushing back with equal force.

• A ball rolling down a slope.

• A car coming to a stop.

• A satellite orbiting the Earth.

Tags

NGSS.MS-PS2-1