Question

What is power?Show that power=force*velocity: calculate power of body mass 10 kg accelerating with 10m/s acquires a velocity of 5m/s?

Answer 1

Answer:

power is the rate of doing work or of transferring heat, i.e. the amount of energy transferred or converted per unit time. Having no direction, it is a scalar quantity.

we know that ;

Power, P =W/T

ALSO, W=FD

so, P=FD/T. (V=D/T)

[P=FV]

mass of the body=10kg

acceleration=10m/s

velocity =5m/s

we know that F=ma

=10*10 = 100

also, P =FV =100*5 =500 W