Physics 3.0 / 5 based on 1 rating ? PhysicsIGCSENone Created by: charlotte_priceCreated on: 27-04-13 12:21 What is direct proportion? Straight line through the origin 1 of 27 State Hooke's Law The extension of a spring is directly proportional to the load on it 2 of 27 What happens after a wire reaches its elastic limit? Extends plastically, permanently deformed, stretches more than expected 3 of 27 In 'F=Kx' what does the 'K' stand for? What is it measured in? Spring Constant in N/cm 4 of 27 Name the ten types of force Weight, electrostatic, tension, compression, thrust, lift, upthrust, magnetic, friction, normal reaction 5 of 27 What does normal reaction do? 'pushes back' from a solid surface 6 of 27 How much is gravity on earth? 10 N/kg 7 of 27 How do we find weight? mass x gravity 8 of 27 Where is an objects centre of gravity? The point at which the weight seems to act 9 of 27 What does the moment depend on? The size of the force and the distance from the force to the pivot 10 of 27 What is 'moment'? What is it measured in? The turning effect of the force in Nm 11 of 27 Complete: Moment= _ _ Force x distance between the force and the pivot 12 of 27 Name the nine energy names Kinetic, heat, light, gravitational, chemical, sound, electrical, elastic, nuclear 13 of 27 State the first law of energy It cannot be created or destroyed, only changed from one type to another. 14 of 27 State the second law of energy Every time energy is changed, some is lost. 15 of 27 What is G.P.E measured in? Joules 16 of 27 How much G.P.E does a 70kg diver gain when he climbs to a 5m board? G.P.E=mgh..... =70x10x5...... =3500J 17 of 27 What does G.P.E stand for? Gravitational Potential Energy 18 of 27 What is the equation for Kinetic Energy? K.E.=1/2m x v(squared) 19 of 27 What is the KE of a 0.4kg cricket ball moving at 40m/s? =1/2x0.4x1600...... =0.2x1600..... =320J 20 of 27 What is the work done to an object? The amount of energy transferred to it 21 of 27 W.D=FD means? Work done(J)=Force(N)xDistance moved(m) 22 of 27 Power is a measure of the amount of work done each _______ Second 23 of 27 What is the equation for power? P=E/T 24 of 27 Efficiency= ? Useful Output/ Total Input 25 of 27 What way can heat move around only in liquids and gases? Convection 26 of 27 What type of heat transfer occurs only in solids? Conduction 27 of 27
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