Question

Distinguish between work, energy and power. State the SI units for each of these quantities. with slove

3 points

Your answer


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Answer 1

Answer:

Work is defined as a force causing the movement or displacement of an object. The SI unit of work is the joule (J)

Power is the rate at which work is done or energy is transferred in a unit of time. The SI unit of power is Watts(W)

Energy is defined as the ability to do work

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Answer 2

Work:

• when force is applied upon a body , it may change the position, direction, velocity or state of rest of a body.Work is said to be done by an applied force upon a body if it produces a displacement in it.
• Mathematically,work done by a body describes a relation between force applied on a body (F) and displacement produced in it (S).
• Work done=force×displacement.

W=Fs

• Work is a scalar quantity.it is described by magnitude and has no direction.

In the honour of a famous physicist James Prescott Joule,the S.I unit of work has been named as Joule (J).

Energy:

• Energy of a body is defined as it's ability to do work.
• Energy is a scalar quality as it is described by magnitude and not direction.
• The S.I unit of energy is same as that of work.(i.e) Joule(J).

Power:

• Power is defined as rate of doing work.
• Power= Work

time

• P=W

t

• Unit of power is Watt.

Explanation:

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