Forces and Motion 3.0 / 5 based on 1 rating ? PhysicsForces and MotionIGCSEEdexcel Created by: EllieCreated on: 18-04-13 18:20 How is velocity different to speed? they are both how fast something is going but in velocity a direction must be specified 1 of 22 what does speed equal? distance over time 2 of 22 What is acceleration? how quickly velocity is changing 3 of 22 What does acceleration equal? change in velocity over time taken 4 of 22 On a distance time graph what does the gradient equal? speed 5 of 22 On a velocity time graph what does the gradient equal? speed 6 of 22 In a velocity time graph what does the area under the graph equal? distance 7 of 22 What is weight? the strength of gravity 8 of 22 What does weight equal? mass times gravitational pull 9 of 22 What two ways does friction occur? between sliding surfaces and gripping surfaces 10 of 22 What is terminal velocity? When an objects accelerating force is equal to the resistant force 11 of 22 What is Newtons first law of motion? Balanced forces mean no change in velocity 12 of 22 What is Newtons second law of motion? A resultant force means acceleration 13 of 22 What does force equal? mass times acceleration 14 of 22 Name three things that effect a drivers thinking distance speed, age,drugs,tiredness etc 15 of 22 Name three things that effect a drivers stopping distance Speed, mass of vehicle, standard of brakes, quality of road, weather,tyres etc 16 of 22 What is the equation linking momentum mass and velocity? Momentum equals mass times velocity 17 of 22 What does momentum before equal? Momentum after 18 of 22 What does force acting equal? Change in momentum over time taken 19 of 22 State Hookes law force is proportional to extension until it reaches its elastic limit where it becomes permanently stretched 20 of 22 What shapes can galaxies be? blobs or spirals 21 of 22 What is a comet made out of? Frozen water, CO2, methane, rocks and ammonia dust 22 of 22
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