AQA GCSE Physics Questions 100% Correct Answers

AQA GCSE Physics Questions 100% Correct Answers What is speed? - ANSWERS how fast something is going How do you work out the speed? - ANSWERS speed= distance ÷ time What is velocity - ANSWERS speed with direction What do distance-time graphs show? - ANSWERS how something is travelling over a period of time What is the gradient of a distance-time graph equal to? - ANSWERS speed- how fast the object is travelling What does the downwards gradient on a distance-time graph show? - ANSWERS it means its going back towards its starting location What do the flat sections on a distance-time graph mean? - ANSWERS it's stationary What do straight up hill or down hill sections mean? - ANSWERS it's travelling at a steady speed The steeper the distance-time graph... - ANSWERS the faster it's going What do curves represent in a distance time graph? - ANSWERS acceleration (steepening curve) or deceleration (leveling off curve) How to work out the speed on a distance-time graph? - ANSWERS the change in y ÷ the change in x What is acceleration? - ANSWERS how quickly the velocity is changing What can the change in velocity be? - ANSWERS change is speed or a change in direction What is the formula for acceleration? - ANSWERS acceleration= change in velocity ÷ time taken What does the gradient equal on velocity-time graph? - ANSWERS acceleration What does the flat sections on a velocity-time graph represent? - ANSWERS steady sped The steeper the velocity-time graph... - ANSWERS the greater the acceleration or deceleration What do the uphill sections mean on a velocity-time graph (/)? - ANSWERS acceleration What do the downhill sections mean on a velocity-time graph ()? - ANSWERS deceleration What does the area under any section of the velocity-time graph (or all of it) mean? - ANSWERS distance travelled in that time interval What does a curve mean on a velocity-time graph? - ANSWERS changing acceleration What is the unit of acceleration? - ANSWERS m/s² What are gravity's two important effects? - ANSWERS - on the surface of a planet, it makes all things accelerate towards the ground - it gives everything a weight What is mass? - ANSWERS amount of stuff in an object What is the unit of mass? - ANSWERS kg What is weight? - ANSWERS the pull of the gravitational force towards the centre of the Earth What is the unit of weight? - ANSWERS newtons