Questions

Statement A : An engine A can perform a given work in 1 hr and engine B can perform the same work in ½ hr then B has greater power than A.

Statement B : Power is the dot product of force and velocity

60 mins Expert Faculty Ask Questions

a

A & B is correct

b

A & B are wrong

c

A is correct and B is wrong

d

A is wrong & B is correct

detailed solution

Correct option is A

Average power = Total work done/Total time, so average power of B is greater than that of A. Also,

Similar Questions

The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be $13.6\times {10}^{3}\mathrm{kg}/{\mathrm{m}}^{3}\mathrm{and}\mathrm{g}=10\mathrm{m}/{\mathrm{s}}^{2}$ then the power of heart in watt is:

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