Work Done (T4) Flashcards

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1
Q

In physics what do we mean when we use the term work?

A

Work is defined as the energy transferred in a given situation.

Work is done whenever energy changes from one form to another.

Work is measured in joules.

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2
Q

Give four examples of work being done..

A
  • a lightbulb works by converting electrical energy into light and heat
  • you will do work if you push a car because the car gains kinetic energy and friction will heat up the wheel bearings and tyres once you reach a steady speed
  • your car brakes do work when they slow you down because they convert kinetic energy into heat
  • lifting a heavy weight off the ground involves work because the weight is gaining gravitational potential energy
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3
Q

What is the equation for calculation work done?

A

W = F x d

W = work done in joules
F = force in Newtons
d = distance moved in metres
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