DISTANCE-TIME GRAPHS, VELOCITY-TIME GRAPHS AND ACCELERATION 3.0 / 5 based on 1 rating ? SciencePhysicsGCSEAQA Created by: RachelCreated on: 30-03-13 12:20 Define velocity Speed in a given direction 1 of 24 On a DISTANCE-TIME graph, what does the gradient represent? The speed at which the object is moving 2 of 24 On a DISTANCE-TIME graph, what do the flat sections represent? Where an object is stationary 3 of 24 On a DISTANCE-TIME graph, straight uphill or downhill sections mean what? That the object is travelling at a steady speed 4 of 24 The steeper the DISTANCE-TIME graph... The faster its going 5 of 24 Downhill sections on a DISTANCE-TIME graph represent that... The object is returning to its original starting point 6 of 24 Curves on a DISTANCE-TIME graph represent what? Acceleration or deceleration 7 of 24 A steepening curve on a DISTANCE-TIME graph means... The object is speeding up (increasing gradient) 8 of 24 A levelling off curve on a DISTANCE-TIME graph means... The object is slowing down (decreasing gradient) 9 of 24 How do you calculate speed from a DISTANCE-TIME graph? Use the gradient - vertical/horizontal 10 of 24 Define acceleration How quickly velocity is changing 11 of 24 The change in velocity can be... A change in SPEED, DIRECTION, or BOTH 12 of 24 Formula for acceleration Acceleration = change in velocity/time taken 13 of 24 The symbol formula for acceleration a = (v-u)/t 14 of 24 The unit of acceleration? m/s2 15 of 24 On a VELOCITY-TIME graph, what does the gradient represent? The acceleration 16 of 24 On a VELOCITY-TIME graph, what do the flat sections represent? A steady speed 17 of 24 The steeper the VELOCITY-TIME graph... The greater the acceleration or deceleration 18 of 24 Uphill sections of a VELOCITY-TIME graph (/) mean... Acceleration 19 of 24 Downhill sections of a VELOCITY-TIME graph (\) mean... Deceleration 20 of 24 The area underneath any section of a VELOCITY-TIME graph... Is equal to the DISTANCE travelled in that particular TIME INTERVAL 21 of 24 A curve on a VELOCITY-TIME graph represents what? Changing acceleration 22 of 24 How do you calculate acceleration from a VELOCITY-TIME graph? By using the gradient: vertical change/horizontal change - eg. p71 of the CGP guide 23 of 24 How do you calculate velocity from a VELOCITY-TIME graph? Read it off the correct axis 24 of 24
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