What is the acceleration (in m/s2) of a car that moves from 4 to 9 m/s in 8 s? How long (in s) will be required for a car to go from a speed of 25 m/s to a speed of 75 m/s if the acceleration is 4 m/s2? A 1500 kg car accelerates uniformly from 47 km/h to 74 km/h in 7 s. What was the net force (in N) exerted on the car? (Hint: Remember to convert km/h to m/s)