A vehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road , then travels 15 seconds at a constant velocity Next it slows down coming to a stop in 5 secondsThe car waits 10 seconds and then backs up for 5 seconds accelerating from 0 t0-10 m/s Draw a graph showing the vehicle's velocity vs time by following these steps.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?