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A description of how far it is from one point to another.

Distance

If gravity acts to pull an object down a hill, this acts to push it up.

Friction

The resistance to the change in motion by an object.

Inertia

A measure of the pulling force of gravity.

Weight

The SI unit for distance.

Meter

F = m x a This is:

Newton’s Second Law of Motion

Also known as The Law of Inertia

Newton’s First Law of Motion

kg. m/s/s

A Newton (N)

The rate of change in velocity

acceleration

Acceleration due to gravity on the surface of the Earth

9.8 m/s/s or m/s 2

What is the weight of an object with a mass of 1 kilogram?

F = ? m = 1 kg a = 9.8 m/s/s F = m x a F = (1 kg)(9.8 m/s/s) F = 9.8 N

Acceleration, deceleration and a change in direction all can be caused when the net force is greater than ___

zero newtons (0 N)

As a box is sliding down a ramp, a 10 newton force of gravity is pulling the box down while a 2 newton force of friction acts to stop the box. What is the net force accelerating the box down the ramp?

10 N – 2 N = 8 N

A tow truck pulls a 2000 kg with a net force of 4000 N. What is the acceleration of the car?

a = F ÷ m m = 2000 kg F = 4000 N 4000 N ÷ 2000 kg a = 2 m/s/s or m/s 2

Jumping on a trampoline is an example.

Newton’s Third Law of Motion

A pencil sitting on a desk (not moving) is an example.

Newton’s 1st Law

The SI unit of Force

The Newton

Determines how much inertia an object has

The mass of the object.

A person flies through the windshield of the car because she did not have their seatbelt on. This is an example of

Newton’s First Law of Motion

What is the SI unit of Mass?

kilograms

If you go to the moon, what happens to your mass

It does not change.

The amount of matter in an object

Mass

If you drop a penny, an elephant, and a puppy at the same time from the same height, which would hit the ground first (ignoring air resistance)?

They would all hit at the same time.

Two factors in determining the amount of gravity between two objects.

The mass and the distance between the two objects

This is what happens to your weight and mass when you go to the moon.

Weight decreases, mass remains the same.