Question

A stronger person “A” may do certain work in relatively less time. A

more powerful vehicle “B” would complete a journey in a shorter time

than a less powerful one. We talk of the power the machines like

motorbikes and motorcars. The speed with which these vehicles

change energy or do work is a basis for their classification. Power

measures speed of the work done that is how fast or slow work is done.

a) If work is done in less time by A & in more time by B. Which is the most

effecient?

b) Work done in unit time is in which physical quantity?

c) What is the commercial unit of energy?

d) Product of power and time given by?

e) What is SI unit of rate of workdone?​

Answer 1

Answer:

e, joule

d, energy

c, 1 kw/h

b ,power