Chapter 11 vocabulary Ashley murray

NON-CONTACT FORCE

A force that acts at a distance.

A magnet and another magnet can be sometimes non-contact force.

FORCE

A push or pull that acts on an object.

A magnet is a force that is very strong.

GRAVITY

The force of attraction between any two objects.

Metal and lightening attracted together.

CONTACT FORCE

A force that requires two pieces of matter to touch.

Lightning is a contact force when it storms it is very dangerous.

ACCELERATION

The rate at which the speed or dicection of motion of an object changes over time.

When you are going down a hill on a bike or scooter you will accelerate by going faster down the hill.

FRICTION

The force that results when two materials rub against each other or when their contact prevents sliding.

When you go on ice there is no friction that is why you slide all over the place.

WEDGE

Simple machine made of one or two inclined planes.

When there is a tight fit of something they are wedging that thing in the space.

PULLEY

Simple machine consisting of a rope or cable that runs around a grooved wheel.

They will use pullies when lifting heavy thing to build.

INERTIA

The tendency of an object in motion.

When car is stopped then it starts you get jerked back that is caused by not moving then moving and sometimes not realizing it.

SCREW

Simplle machine consisting of a smooth cylinder with a tiny incline plane wrapped around it.

When people are building they normally use a screw to pull it together.

SIMPLE MACHINE

A machine made up of one or two parts.

When you crack a walnut, or crab claw you use a simple machine to open it.

WHEEL AND AXLE

Simple machine made up of a circular object attached to a bar.

When car wheels safe going they are connected to a bar.

INCLINE PLANE

Simple machine consisting of a flat surface with one end higher than the other.

A incline plane is used to help lift something up to a hig thing like a big container into a moving truck.

LEVER

A simple machine in which a bar moves around a fixed point called a fulcrum.

On a seasaw it is kinda like a lever you go up and down.

Chapter 11 vocabulary

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