Name the Physical Quantity Associated with the 'Rate of Doing Work'.

Name the physical quantity associated with the 'rate of doing work'.

One Line Answer

Power is the physical quantity associated with the 'rate of doing work'.

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Chapter 1: Force, Work, Energy and Power - 1.5 Graded Assignment [Page 56]

Chapter 1 Force, Work, Energy and Power
1.5 Graded Assignment | Q 52. | Page 56

A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.

Define 1 joule of work.

Complete the following sentences:

1 H.P. = ........ W.

A weight lifted a load of 200 kgf to a height of 2.5 m in 5 s. calculate: (i) the work done, and (ii) the power developed by him. Take g= 10 N kg^-1.

A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.

In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?

What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?

The work done by the heart is 1 Joule per beat. Calculate the power of the heart if it beats 72 times in one.