ASVAB Mechanical Comprehension Practice Test 69595

Question 1 of 5

Power is the rate at which work is done, P = w/t, or work per unit time. The watt (W) is the unit for power and is equal to 1 joule (or newton-meter) per second. Horsepower (hp) is another familiar unit of power used primarily for rating internal combustion engines. A 1 hp machine does 550 ft⋅lb of work in 1 second and 1 hp equals 746 watts.

Power is the rate at which:

potential energy is converted into kinetic energy

work is done

friction is overcome

input force is transferred to output force