Question

what is the power of an engine that pulls a 1000 kg automobile at a steady speed of 10 m/s along a level road?

Answer 1

Explanation:

if there is no friction, pulling at a steady speed on a level road does not do work.

If there is kinetic friction μk, then

F=force = μk * mg

v=velocity = 10 m/s

Power = F.v j/s = F.v watts

Answer 2

Answer:

m=1000 kg

V=10m/s

P is required

Explanation:

As we know that

P=Fv

And F=ma

=1000*9.8

=9800 N

Putting the values of Fand v in formula of P

P= (9800)*(10)

=98000 watt