Forces and Energy Review

Force

• A push or pull that causes an object to move, stop, or change direction.
• A change in position or location
• Where an object is located in space.
• A line or course along which something is moving.

Movement

• A push or pull that causes an object to move, stop, or change direction.direction.
• A change in position or location
• Where an object is located in space.
• A line or course along which something is moving.

Position

• A push or pull that causes an object to move, stop, or change direction.
• A change in position or location
• Where an object is located in space.
• A line or course along which something is moving.

Direction

• A push or pull that causes an object to move, stop, or change direction.direction.
• A change in position or location
• Where an object is located in space.
• A line or course along which something is moving.

Gravity

• A push or pull that causes an object to move, stop, or change direction.direction.
• A change in position or location
• The force that causes objects with mass to attract one another.
• A line or course along which something is moving.

Friction

• A push or pull that causes an object to move, stop, or change direction.direction.
• A change in position or location
• The force that causes objects with mass to attract one another.
• A force that resists the motion of two surfaces sliding across one another.

Which of these is NOT an example of a bicycle using mechanical energy?

• The pedals, gears, and chain turn the wheels.
• The wheels turn when the bicycle moves.
• The front wheel guides the bicycle when it moves.
• The reflector allows the bicycle to be seen at night.

A push or a pull that can move an object is a __________.

• gear
• lever
• force
• machine

The force that opposes the motion of two surfaces sliding past each other is called ___________.

• acceleration
• inertia
• friction
• unbalanced

The force resulting from the pull of the earth on an object.

• mass
• gravity
• acceleration
• unbalance