Chapter 12 Forces and Motion Review

Name the 4 types of friction?

fluid, static, sliding, rolling

What is the acceleration due to gravity?

9.8 m/s/s

What is a force?

A push or pull that acts on an object

What is one newton equal to?

1 Newton = 1 Kilogram x m/s/s

What is a force diagram?

A diagram that identifies all force acting upon an object

Define gravity

A force that acts between any two masses

What can you use to represent a force?

A vector

What is Newton's first law?

An object in motion stays in motion, an object at rest stays at rest unless an outside force acts upon it.

What is Newton's 3rd Law?

For every action, there is an equal and opposite reaction

What is the formula for Newton's 2nd Law?

Force = Mass x Velocity

What are the two types of forces that commonly act on objects?

Friction and Gravity

Define the Law of Conservation

If no net force acts on a system, then the total momentum of the system does not change

What is the formula for momentum?

Mass x Velocity

What unit is force measured in?

Newtons

What is the net force?

Overall forces acting on an object after all the forces are combined

What is throwing a baseball an example of?

Projectile motion

What is projectile motion?

The combination of forward velocity and downward acceleration

What is terminal velocity?

The constant velocity where an object stops accelerating because of the force of air resistance equals the force of gravity

Define inirtia.

The resistance of an object to move.

If both a bowling ball and a sheet of paper fell from the same distance at the same time, which would hit the ground first? *(neglect air resistance)

They would both hit the ground at the same time

What is the formula for weight?

Weight = Mass x Acceleration due to gravity

Define an unbalanced force

When the net force is not equal to 0

Define mass.

measurement of inirtia of an object.

What type of friction is strongest: sliding or static?

static friction