physics c3-4 0.0 / 5 ? Physicsc3-4GCSEAQA Created by: amiewadsworthCreated on: 10-11-16 20:07 distance = average speed X time 1 of 19 acceleration = change in speed '/. time 2 of 19 the gradient of a distance- time graph is the speed- the steeper the gradient, the higher the speed 3 of 19 relative velocity is the difference between the velocities of the two bodies having regard to their direction 4 of 19 forces always occur in pairs that are 1. the same size 2. act in opposite directions 3. act on different objects 5 of 19 force = mass X acceleration 6 of 19 weight = mass X gravitational field strength 7 of 19 when a car stops total stopping distance = thinking time + braking distance 8 of 19 moving objects have kinetic energy 9 of 19 Kinetic energy = 1/2massvelocity2(squared) 10 of 19 roller coasters have gravitational potential energy as the source of movement 11 of 19 during a roller coaster ride GPE is transferred into KE and back again 12 of 19 work is done - ... energy is ... power is .... 1. when a force moves through a distance 2. needed to do work 3. measure of how quickly work is done 13 of 19 work done = force X distance 14 of 19 power = work done '/. time 15 of 19 power = force X speed 16 of 19 modern cars have lots of safety features that absorb energy when a car stops 1. crumple zones 2. seat belts 3. air bags 17 of 19 force = change in momentum '/. time 18 of 19 terminal speed happens when forces acting on an object are balanced 19 of 19
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