Question

A car with a mass of 800kg experience a friction force of 180N and travels at a constant speed of 54km/h. Calculate the power required from the engine to travel at the constant speed.

Answer 1

F * v

Answer 2

dont you need distance and time to calculate power?

Answer 3

yes you do :) velocity = distance/time. so both are involved :)

Answer 4

no need distance...... its enough... bcoz 180N is given... thn what else needed

Answer 5

power=work done/time

Answer 6

work done=force x distance

Answer 7

p=w/t
w=fd
p=fd/t
d/t= v
so p=fv
you have both