Determine the time required for a car

1. A ball is dropped from rest from a height of 2m above the ground. a. What is the speed of the ball when it hits the ground? b. How much time will pass between when it is released and when it hits the ground? v = 0 2 m g = 9.81 m/s²

1) A subway train starts from rest at a station and accelerates at a rate of 1.6 m/s² for 14 seconds. It runs at constant speed for 70 seconds and slows down at a rate of 3.5 m/s² until it stops at the next station. Find the total distance covered by the subway train.

A helicopter with a mass of 10,000 kg takes off straight up at t=0. The thrust of the engine is defined given as a function of time: FT= 95 0.18t- (kN). Where t is in units of seconds. How fast is it rising and what is its elevation at t=4s?