7. A 0.4 kg toy car is subjected to a constant force of 2 N that accelerates it from 0.5 to a speed of 0.75 m/s. What is the impulse applied to the toy
car?

A. 0.1 m/s
B. 0.1 kg m/s
C. 0.25 m/s
D. 1.65 kg m/s

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.