GCSE WJEC Physics- dist + speed + acceleration

unit for acceleration

m/s²

vector example (2)

velocity + acceleration

scalar is a measurement of..

magnitude (size) only

newtons 2nd law

resultant force = mass x acceleration

weight

force of gravity (N)

newton’s 1st law

a body will remain at rest or at a constant velocity unless acted upon by an external resultant force

resultant force is

overall force acting on an object

newtons 3rd law states

that the force exerted by object A on object B is equal and opposite to the force exerted by object B on object A

velocity- time graph horizontal line

constant velocity

velocity- time graph straight line up

acceleration

velocity- time graph straight line down

decceleration

dist- time graph straight line up + down

constant speed

dist- time graph horizontal line

stationary

scalar example (2)

distance + mass

purpose of speed limits

slow vehicle → reducing total stopping distance

total stopping dist- velocity graph shape

curve

thinking dist- velocity graph shape

straight

things that affect reaction time

driver → alcohol + speed + tiredness

total stopping distance is

thinking distance + braking distance

things that affect braking distance

car → speed + brakes + road

inertia

how hard it is to change the motion of an object

braking dist- velocity graph shape

curved

mass

matter/ material an object has (kg etc)

gravitational field strength of earth

10N/KG

weight equation

weight = mass x gravitational field strength

vector is a measurement of

magnitude (size) + direction