Changing Speed 0.0 / 5 ? Physicschanging speedGCSEOCR Created by: Lily04Created on: 11-06-17 18:27 What does a horizontal line on a speed-time graph represent? speed is constant 1 of 10 how do you work out total distance travelled from a speed-time graph? total area under the graph 2 of 10 Complete the sentence: The faster the speed of an object... the greater the distance it travels in a particular time and the shorter the time it takes to travel a particular distance. 3 of 10 The gradient of a speed-time graph represents what ? Acceleration or deceleration 4 of 10 Define acceleration/deceleration The acceleration/deceleration of an object is the change in speed per second. It's a measure of how quickly an object speeds up or slows down. 5 of 10 Give the formula for working out acceleration acceleration = change in speed / time taken for change 6 of 10 What is velocity? velocity is speed in a certain direction 7 of 10 What is meant by acceleration being a VECTOR QUANTITY? Acceleration can involve a change of direction as well as speed- acceleration is a CHANGE IN VELOCITY 8 of 10 How do you calculate the relative velocity of two objects if they are MOVING TOWARDS EACH OTHER? add the two speeds together 9 of 10 How do you calculate the relative velocity of two objects if they are MOVING IN THE SAME DIRECTION? subtract the two speeds from each other 10 of 10
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