Y8 Forces full topic

Gravity

A force of attraction between objects that is due to their masses.

push

the act of applying force in order to move something away

pull

the act of applying force in order to move something closer

Friction

A force that opposes motion between two surfaces that are in contact

Weight

A measure of the force of gravity on an object (in Newtons)

Mass

the amount of matter in an object (in kg)

balanced forces

Equal forces acting on an object in opposite directions

unbalanced forces

Forces that cause a change in the motion of an object

Resultant force

The overall force on a point or object

reaction force

force acting in the opposite direction

air resistance

force that opposes the motion of objects that move through the air

water resistance

A force on objects moving through water.

speed

distance/time

distance

speed x time

time

distance/speed

m/s

unit for speed

distance-time graph

Line graph used to show the speed of a moving object

stationary

standing still; not moving

gradient in a distance-time graph

speed