Forces and Motion Unit Review

Front

What is the definition of force?

Back

A force is a push or a pull that can change the motion of an object.

Front

What is the Law of Inertia?

Back

The Law of Inertia states that an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by a net external force.

Front

What is the difference between a push and a pull?

Back

A push moves an object away from you, while a pull brings an object closer to you.

Front

What does the 2nd Law of Motion state?

Back

The 2nd Law of Motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is an example of the 3rd Law of Motion?

Back

When you jump off a small boat, the boat moves backward as you move forward.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, caused by the contact between two surfaces.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other, commonly experienced as the force that pulls objects towards the Earth.

Front

What is acceleration?

Back

Acceleration is the rate at which an object changes its velocity, which can be an increase or decrease in speed.

Front

What is the relationship between mass and force?

Back

The greater the mass of an object, the more force is required to accelerate it.

Front

What is an example of balanced forces?

Back

When two people push against each other with equal force, and neither moves, the forces are balanced.