GCSE WJEC physics- work and energy

inertial losses

reduced by having lighter cars

vehicle efficiency

-aerodynamic losses

-rolling resistance

-idling losses

-inertial losses

hooke’s law

extension of a material is directly proportional to the force applied

work done

energy transferred to an object when its moved

car safety features

air bag + crumple zone increases dist of energy transferred and decreases force

aerodynamic losses

reduced by more streamlined designs

rolling resistance

reduced by having correctly inflated tyres with materials that dont heat easily when squashed

idling losses

reduced by stop- start systems