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.

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.

anonymous · Answer

F * v

anonymous · Answer

dont you need distance and time to calculate power?

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

power=work done/time

anonymous · Answer

work done=force x distance

anonymous · Answer

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