Physics (Mechanics) Definaition for ocr a Physics as 3.0 / 5 based on 2 ratings ? PhysicsASAll boards Created by: LewisCreated on: 13-11-11 19:38 Acceleration The rate of change of an objects velocity. 1 of 12 Breaking distance The distance travelled by a vehicle from the moment when brakes are applied untill the vehicle comes to a stop. 2 of 12 Centre of gravity The point where the entire weight of an object appears to act. 3 of 12 Density The mass per unit volume of material. 4 of 12 Displacement The distance moved by an object in a particular direction (measured from a fixed starting point). 5 of 12 Effiiciency Useful output energy/ total input energy x 100 6 of 12 Equilibrium The net forces acting on the object are equal to zero. The torque of the object is equal to zero. 7 of 12 Newton The force that will give a 1KG mass an acceleration of 1 ms^-2. 8 of 12 Moment The moment of a force about a point is the magnitude of the force, multiplied by the perpendicular distance of the point from the line of the force. 9 of 12 Power The rate at which energy is transferred or the rate at which work is done. 10 of 12 Pressure The force acting normally per unit area of surface. p=F/A 11 of 12 Stopping distance The sum of the braking distance and the thinking distance. 12 of 12
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