Motion 0.0 / 5 ? PhysicsForces and MotionGCSEAQA Created by: alliealCreated on: 22-12-13 09:47 What is speed? distance travelled by an object each second 1 of 13 What does the gradient of a distance-time graph represent? Speed, greater the gradient, greater the speed 2 of 13 When is the line on a distance-time graph horizontal? When the object is stationary 3 of 13 On a distance-time graph, what does an object travelling at constant speed look like? A straight line sloping upwards 4 of 13 How is speed calculated? Speed (m/s) = Distance travelled (m) / Time Taken (s) 5 of 13 What is velocity? Speed with direction 6 of 13 What is acceleration? change in velocity per second 7 of 13 How do you calculate acceleration? acceleration (m/s squared) = final velocity (m/s) - initial velocity (m/s) / time (s) 8 of 13 What is a negative acceleration? deceleration 9 of 13 What does the gradient of a line on a velocity-time graph represent? Acceleration; steeper the gradient, greater the acceleration 10 of 13 What is happening when the line is horizontal on a velocity-time graph? Acceleration is zero, the object is travelling at a steady speed 11 of 13 How is deceleration shown on a velocity-time graph shown? The line has a negative gradient 12 of 13 How do you work out distance travelled on a velocity-time graph? the area under the line; the bigger the area, the greater the distance travelled 13 of 13
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