You apply a force of 54 N to a car jack in order to change a tire. Each "Crank" of the jack is exerted over a distance of 64 cm. What is the work input on the car jack? (Hint: 1m = 100 cm)
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An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.