Asports car is travelling at a constant velocity v = 5.00 m/s. the driver steps on the gas, and the car accelerates forward. after 10.0 seconds, the driver stops accelerating and maintains a constant velocity v = 25.0 m/s. what was the car’s acceleration?

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.