Additional Physics All additional physics topics. 4.5 / 5 based on 4 ratings ? PhysicsGCSEAll boards Created by: Jessica GreenCreated on: 09-05-12 20:25 Velocity and Speed Formula speed = distance time speed is how fast you are moving velocity is how fast you are moving in the given direction speed = m/s distance = m time = sec 1 of 9 Acceleration Formula acceleration = change in velocity time how quickly the velocity is changing change in velocity = final velocity - starting velocity velocity = m/s acceleration = m/s2 2 of 9 Distance-Time Graph 3 of 9 Distance-Time Graph A-B - steady speed B-C - stopped C-D - steady speed gradient = speed curved lines - acceleration or deceleration, not steady speed 4 of 9 Velocity-Time Graph 5 of 9 Velocity-Time Graph A-B - steady speed B-C - deceleration C-D - steady speed D-E - acceleration gradient = acceleration area under graph = distance travelled Gradient y2-y1 x2-x2 =gradient = aceleration 6 of 9 Gravity Force of attraction between ALL masses on the surface of a planet - makes things move towards the ground, pull towards the center of earth give EVERYTHING a weight keeps planets, moons and satellites in orbit 7 of 9 Weight and Mass Weight measured in newtons (N) weight is caused by gravity weight changes - different on the moon than on earth measured by a newton meter Mass measured in kilograms (kg) the 'amount of stuff' in an object the same everywhere 8 of 9 Weight Formula weight = mass x gravitational field strength mass = kg weight = newtons gravity different on different planets - earth = 10N/kg, moon = 1.6N/kg 9 of 9
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