CP7 & 8 0.0 / 5 ? PhysicsEnergy-Forces Doing WorkForces and their EffectsGCSEEdexcel Created by: Kiera McQueCreated on: 10-11-17 12:38 When can energy be transferred? Whenever things happen/when force makes something move 1 of 20 Energy transferred by a force is called Work done- depends on size of force and how far force moved 2 of 20 What's the equation for work done? work done= force x distance moved in direction of force 3 of 20 The equation for work done can be written as... E= f x d 4 of 20 work done is measured in... Joules (J) 5 of 20 Danny is moving a box weighing 300N. He pulls it 3m along, using a force of 200N. Calculate the work Danny does. 200N x 3m= 600J 6 of 20 What is Power? Power is the rate at which energy is transferred- when energy is transferred by forces, power is also the rate at which work is done 7 of 20 Power is measured in... Watts (W) 8 of 20 What is the equation for Power? Power= work done/time taken 9 of 20 The equation for Power can written as... P=E/t 10 of 20 If objects are touching, then the forces between them are... contact forces 11 of 20 A non-contact force is... a force that doesn't need to touch an object e.g. gravity 12 of 20 The gravitational forces between two objects with mass can be represented as... vectors- arrows that show both direction and magnitude 13 of 20 What are action-reaction forces? pairs of forces that act on different objects in opposite directions 14 of 20 What is a force field? The space around an object where it can affect other objects 15 of 20 What other forces affect objects without being in direct contact with them? Magnetism and static electricity 16 of 20 What is a magnetic field? The space around a magnet where it can affect other materials 17 of 20 An object charged with static electricity has an... electric field (electrostatic field) around it 18 of 20 Two objects with the same charge that are close together produce... a pair of forces that are equal in size and acting in opposite directions 19 of 20 If the forces acting on an object are equal in size but in opposite directions, the resulant force is 0 20 of 20
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