Force and Motion review

What is a force?

• A speed and direction

• A push or pull

• A rise or run

• A this or that

What is motion?

• the tendency to resist a change in motion

• When 2 surfaces rub against each other

• How far an object moves in a certain amount of time

• When an object changes its position over time

What is speed?

• How far an object moves in a certain amount of time

• The force of attraction on all objects

• The tendency to resist a change in motion

• When an object changes its position over time

What is acceleration

• A change in direction

• speed up

• slow down

• Change in height

What is velocity

• A speed and a direction

  Ex. 55mph NE

• A speed

  Ex. 55mph

• A direction

  Ex. NE

• 42 mph

Unbalanced force

• Net force not zero

  A change in motion will occur

• Net force zero

  No change in motion will occur

Balanced force

• Net force not zero

  A change in motion will occur

• Net force zero

  No change in motion will occur

Reference point

• A point of a pencil

• A point that shows where an object is on a map

• A stationary object that tells how far an object has moved

What is Gravity?

• An attractive force that attracts everything to each other

• A force that repels everything from each other

• A contact force

• A force that is not important to science

What is inertia?

• The tendency of an object to resist a change in motion

• The force of attraction on all objects

• When an object changes its position over time

• A speed and a direction

  Ex 55mph SE