KS3 Science Forces Revision

A force can be...

• a push

• a pull

• nothing

• a push and a pull

gradient:

• slope of a graph

• interaction between two objects that results in each an exerting pull or a push

• speeding up; increasing speed

• the SI unit of force

acceleration

• process where something is squeezed

• speeding up; increasing speed

• ammount of matter in an object, measured in kilograns (kg)

• slope of a graph

compression

• forces between two objects caused by their masses

• unit of mass

• process where something os squeezed

• ammount if space taken by an object, measured in m3, cm3, litres

density

• measure of the concentration of mass in an object or material, calculated using density= mass/volume

• graph showingthe distance of an object has moved chages at different times

• unit of mass

• the pull of gravity on an object; a force measured in newtons (N)

distance

• upward force of a solid object when it is in liquid or gas.

• slope of a graph

• the SI unit of force

• how far an object has moved

distance-time graph

• force caused when one surface rubs against another

• unit of mass

• graph showing how the distance of an object has moved changes at different times

• speed in a particular direction

extension

• unit of mass

• extra length to which a spring is streched by forces

• the rate of which an object moves: Speed= Distance/time

• slope of a graph

friction

• the SI unit of force

• force caused when one surface rubs against another

• slope of a graph

• unit of mass

gram

• slope of a graph

• speeding up, increasing speed

• how far an object has moved

• unit of mass