Question

A 875-kg car can produce a useful power output of 45.5 hp. What is the car's power output in watts?

A. 34,000 W
B. 33,900 W
C. 34,500 W
D. 35,000 W

Answer 1

The car's power output in watts is found by multiplying the horsepower by 746, which gives 33,939.7 W. This can be rounded to 33,940 W, and the closest answer is 33,900 W (option B).

Step-by-step explanation:

To convert the power output from horsepower (hp) to watts (W), you multiply the number of horsepower by 746 W, because 1 hp equals 746 W. Given that the car has a useful power output of 45.5 hp, you can calculate the power output in watts as follows:

Power output in watts = Power output in horsepower × 746 W/hp

So,

Power output in watts = 45.5 hp × 746 W/hp

Power output in watts = 33939.7 W, which can be rounded to 33940 W or 33.9 kW.

Therefore, the closest answer to the car's power output in watts is 33,900 W, which corresponds to option B.