Posted by **eli** on Friday, December 9, 2011 at 7:30pm.

if a car generates 18 hp when traveling at a steady 88 km/h, what must be the average force exerted on the car due to friction and air resistance

- physics -
**drwls**, Friday, December 9, 2011 at 8:56pm
If the proper units are used (Watts, m/s and newtons, for example),

Power = Force * Velocity

First convert to SI units:

88 km/h = 24.44 m/s

18 Hp = 13,428 Watts

Force = P/V = 549 newtons

- physics -
**Clay McNutt**, Wednesday, November 18, 2015 at 9:45pm
13,428/24.4= 5.5x10^2N

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