Question

Why effiency of high speed in automobile measured in horsepower ? give proper reasoning

Answer 1

Horsepower (hp) is a unit of measurement of power (the rate at which work is done).

 

James Watt came up with the concept of horsepower — which is a measure of, interestingly enough, power. 1 HP is the equivalent of 33,000 ft/lbfs per minute. The reason for the complex unit is that we’re accounting for three things with this number: the amount of weight involved, the distance it’s being moved, and how long it takes to do it.

 

We can't say that the effiency or fuel efficiency completely depends on hp. Horsepower simply defines the power of the car.

 

Car efficiency is measuerd in horsepower, CC, torque, acceleration etc.