Motion 0.0 / 5 PhysicsForces and MotionGCSEAQA Created by: reviser56Created on: 29-04-18 09:40 Acceleration The amount by which speed increases in one second. 1 of 21 Atmospheric Pressure Pressure caused by the collisions of air molecules that produce a force. 2 of 21 Average Speed The total distance travelled in the total time taken for a complete journey. 3 of 21 Centre Of Gravity The point in an object where the force of gravity seems to act. 4 of 21 Centre Of Mass The point in an object where the mass of an object seems to act. 5 of 21 Compressed Squashed into a smaller space. 6 of 21 Density The mass of a material in a certain volume. 7 of 21 Distance-Time Graph A graph that shows how far an object moves each second. 8 of 21 Gas Pressure The force exerted (applied) by air particles when they collide with a surface. 9 of 21 Incompressible Cannot be compressed (squashed). 10 of 21 Instantaneous Speed The speed at a particular moment. 11 of 21 Law Of Moments The object is in equilibrium (balanced) if the clockwise moments equal the anti-clockwise moments. 12 of 21 Liquid Pressure The pressure produced by collisions of particles in a liquid. 13 of 21 Metres Per Second A unit of speed. 14 of 21 Moment A measure of the ability of a force to rotate an object about a pivot. 15 of 21 Newton Metres The unit of moment. 16 of 21 Newton Metres Per Metre Squared A unit of Pressure. 17 of 21 Pivot The point about which a lever or see-saw balances. 18 of 21 Pressure A forced exerted (applied) on a certain area. 19 of 21 Relative Motion The difference between the speeds of 2 moving objects, or of a moving and stationary object. 20 of 21 Speed A measure of how far something travels in a given time. 21 of 21

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