science P3 0.0 / 5 ? SciencePhysicsGCSEAll boards Created by: emwatsonCreated on: 15-11-15 14:36 How do you measure speed? average speed=distance ÷ time 1 of 10 What does the gradient tell us on a distance time graph ? about the speed of the object. e.g a higher speed = steeper gradient 2 of 10 what is a change of speed per unit called? acceleration 3 of 10 formula of measuring acceleration acceleration= change in speed(or velocity) ÷ time taken 4 of 10 why might reaction time increase ? tired , under the influence of alcohol , travelling faster, distracted 5 of 10 why might braking distance increase ? road conditions poor, car hasn't been properly maintained e.g worn brakes , speed increased 6 of 10 what is work done? when a force moves an object in the direction in which the force acts. 7 of 10 what is the formula for work done? work done= force × distance moved ( in the direction of the force) 8 of 10 name some safety features within a car..... crumple zone, seat belts , air bags 9 of 10 what is terminal speed? maximum speed reached by a falling object. This happens when the forces acting on the object are balanced 10 of 10
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