Module 5 Work, Energy and Power 0.0 / 5 ? PhysicsWork, Energy, PowerASAll boards Created by: oliviajade26Created on: 01-05-19 21:57 What is work done? Work done= force x distance moved in the direction of the force 1 of 10 How are work done and energy transferred linked? They are equal (energy= the capacity to do work). 2 of 10 How do you calculate work done by a force when the force is applied at an angle? The component of the force in the direction of motion is fcos(angle). W= Fxcos(angle) 3 of 10 What is the principle of conservation of energy? The total energy of a closed system remains constant: energy can never be created or destroyed, but it can be transferred from one form to another. 4 of 10 What is kinetic energy and how do you calculate it? The energy associated with an object as a result of its motion. Ek= 1/2 mv^2 5 of 10 What is gravitational potential energy and how do you calculate it? The capacity for doing work as a result of an object's position in a gravitational field. GPE= mass x g x height 6 of 10 Which equation relating kinetic energy to gpe eliminates mass? v= square root of 2gh 7 of 10 What is power and how is it calculated? Rate of work done. P= Work done/time (rate of energy transfer) 8 of 10 What equation for power can be used when constant force is necessary to maintain constant speed? P=Fv 9 of 10 How do you calculate efficiency? useful output energy/total input energy x100 10 of 10
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