Work and Power 0.0 / 5 ? PhysicsForces and MotionGCSEEdexcel Created by: RobertJ3Created on: 18-09-18 16:25 1. What are the units for energy? Joules. 1 of 14 2. How is energy transferred to a light bulb? By electricity. 2 of 14 3. How is energy transferred away from a light bulb? By heating and light. 3 of 14 4. Describe one other way in which energy can be transferred. By sound or mechanical forces. 4 of 14 5. What is a force? Simply, a push or a pull. 5 of 14 6. What are the units for measuring forces? Newtons 6 of 14 7. What is your weight? Weight = Mass x gravitational field strength W=mg 7 of 14 8. What does work done mean in physics? Energy transferred by a force 8 of 14 9. What does power measure? Energy transferred per second 9 of 14 10. What are the units for power? Watts 10 of 14 11. What is the equation linking work done, force and distance? Work done = force x distance W = fd 11 of 14 12. What is the equation linking power, work done and time Work done = Power x time E = Pt 12 of 14 13. What is the equation that enables you to calculate how much gravitational potential energy something has? GPE = mass x gravitational field strength x height GPE = mgh 13 of 14 14. What is the equation that enables you to calculate energy efficiency? efficiency = useful energy out/ total energy in 14 of 14

## Comments

No comments have yet been made