Work and Energy

3. SI unit of power
5. is also called joules
6. English unit of power
7. the difference between the final and initial position of a point
9. he developed the steam engine
12. other term for initial velocity
13. results from equal and opposite forces acting on two different points of a rigid body
14. is the component, perpendicular to the surface of the contact force exerted on an object by, the surface of a floor or wall, preventing the object from penetrating the surface.
16. is the sum of potential energy and kinetic energy.
18. SI unit of time.
19. is the product of force and displacement.
20. used as measuring unit of work

1. is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other
2. is defined as the amount of work or the capacity of the machine to perform per unit time
4. defined as the ratio of the output if useful power produced by the machine to the input power supplied to the machine.
8. is energy which results from position or configuration
10. is the energy of motion
11. usually developed by a machine or engine placed either within or external body
15. is a property of a physical body which determines the body's resistance to being accelerated by a force and the strength of its mutual gravitational attraction with other bodies
17. ability to do work.