Physics

When is work said to be done by a force ?

Machines

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Answer

Work is said to be done if the force applied on the body moves it. If no motion or change in position takes place, no work is said to be done.

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Related Questions

State whether the following statements are true or false:
(a) A boy does work while pushing a wall.
(b) A machine performs work by itself.
(c) In an ideal machine, work done on load is equal to the work done by effort.
(d) All levers are force multipliers.
(e) A pulley changes the direction of force.
(f) An inclined plane always has the mechanical advantage more than 1.
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