25 terms

Motion

When an objects distance from another object is changing.

Reference Point

A place or object used to determine whether something is in motion or not.

Speed

Distance divided by time

Velocity

Speed in a given direction

Acceleration

Speeding up, slowing down, or changing direction

Acceleration

the rate at which velocity changes

Force

A push or a pull

Net Force

The total force acting on an object in any interaction.

When two forces act in the same direction

they combine

When two forces act in opposite directions,

you subtract to find the next force

Balanced Force

when the net forces acting on an object equal zero

Gravity

the force that pulls objects to Earth

Inertia

A bodies tendency to resist a change in motion

Newton's 2nd Law

Force = Mass x Acceleration

The greater an objects mass, the greater its...

inertia

Friction

The force that one surface exerts on another when the two surfaces rub against each other

Newton's 3rd Law

For every action there is an equal and opposite reaction.

Newton's 1st Law

An object in motion will stay in motion and an object at rest will stay at rest until acted on by an outside force.

Mass

The amount of matter in an object

Another name for Newton's 1st law

Law of Inertia

Newton's 2nd Law is also known as the

Law of Acceleration

You are riding a bike and suddenly hit a rock which causes your bike to stop. Which of Newton's laws explain WHY your body flew forward?

Newton's 1st Law or Law of Inertia

Which laws explain why a canoe goes forward when you push the paddle backwards?

Newton's 3rd Law

Which law explains why you skate faster when you push harder with your leg muscles?

Newton's 2nd law

What forces keep everything on Earth from floating up?

gravity, friction, normal force