science P3 0.0 / 5 ? SciencePhysicsGCSEOther Created by: sahmed343Created on: 26-04-17 14:46 Formula for force? Force=mass x acceleration 1 of 24 Why might thinking distance increase? If the driver is: -tired - under the influence of alcohol - travelling faster - distracted 2 of 24 Why might braking distance increase? If road conditions are poor,If car has not been properly maintained or if speed is increased 3 of 24 What are some factors that affect braking distance The greater the speed of the vechile -the greater the mass 4 of 24 What is it important to do to ensure safedriving? Keep an apprioate distance from car in front -have different speed limits for different types of road and locations 5 of 24 Formula for weight? Weight=mass x gravitional field strength 6 of 24 When all objects fall with the same acceleration ,what is it due to? Gravity 7 of 24 What does the size of air resistance force depend on? Its cross-sectional area and its speed 8 of 24 What is cross-sectional area? The larger the area the greater the air resistance 9 of 24 What is uneffected by atmosphere conditions? Gravitional field strength 10 of 24 What is gravitational potential strength? An object held above the ground 11 of 24 What does a bouncing ball do? Converts its gravitational potential energy to kinetic energy 12 of 24 What is terminal speed shown as when its reached Change in GPE=work done against friction 13 of 24 Formula for acceleration? Change in speed(or velocity)/time taken 14 of 24 What is acceleration? A change of speed per unit time e.g 10m/s 15 of 24 What is velocity? Its a vector-it has both size(speed) and direction 16 of 24 Formula for average speed? Distance/time 17 of 24 What does a straight line mean in a distance time graph,and why? Constant speed because of constant gradient 18 of 24 Formula for momentum? Mass x Velocity 19 of 24 Formula for force Change in momentum/time 20 of 24 How do you work out kinetic energy? 1/2 x Mass x Velocity 21 of 24 When do mordern cars absorb energy? mordern cars absorb energy when a vechile stops suddenly 22 of 24 How do mordern cars absorb energy? As brakes get hot ,crumple zones change shape,seat belts that stretch a little , air bags that inflate and squash 23 of 24 Why do some people not like to wear seatbelts? Risk of chest injury,they may be trapped in a fire,drivers may be encouraged to drive less carefully because they know they have protection 24 of 24
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