Conservation and Dissipation of Energy (Paper 1) Flashcards

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1
Q

Define ‘work done’

A

The force acting on an object to make that object move.

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2
Q

What is ‘work done’ the same as?

A

Energy transfered.

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3
Q

What is the equation linking force, work done, and distance.

A

W=Fs
Where W is work done, F is force, and s is distance moved. (along the line of action of the force).

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4
Q

What is the energy in work done to overcome friction transferred as and where to?

A

Work done to overcome friction is transferred as energy to the thermal energy stores of the objects that rub together and to the surroundings.

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5
Q

Define ‘power’

A

Power is the rate of transfer of energy.

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6
Q

What is an equation to calculate power?

A

An equation used to calculate power is P=E/t
When P is power, E is energy transferred to the appliance, and t is the time taken for energy to be transferred.

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