Motion And Pressure 0.0 / 5 PhysicsForces and MotionGCSEAQA Created by: christaa123Created on: 26-04-18 10:40 Acceleration The amount by which speed increases in one second. 1 of 17 Atmospheric pressure Pressure caused by the collisions of air molecules that produce a force on an area 2 of 17 Average Speed The total distance travelled in the total time taken for a complete journey 3 of 17 Centre of gravity The point in an object where the force of gravity seems to act 4 of 17 Centre of mass The point in an object where the mass of an object seems to act 5 of 17 Compressed Squashed into a smaller space. 6 of 17 Density The mass of a material in a certain volume 7 of 17 Distance-time graph A graph that shows how far an object moves each second 8 of 17 Incompressible Cannot be compressed(squashed) 9 of 17 Instaneous speed The speed at a particular moment 10 of 17 Law of moments An object is in equlibrium if the clockwise moments equal the anticlockwise moments 11 of 17 Liquid Pressure The pressure produced by collisions of particles in a liquid 12 of 17 Relative Motion The difference between the speeds of 2 moving or of a moving and a stationary object 13 of 17 Moment A measure of the ability of a force to rotate an object about a pivot 14 of 17 Pivot The point about which a lever or sea-saw balances 15 of 17 Pressure A force exerted on a certain area 16 of 17 Speed A measure of how far something travels in a given time 17 of 17

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