A rocket test sled accelerates at a constant rate of 15 m/s2 from rest while moving along a straight track. The rocket e
Posted: Wed Jul 06, 2022 11:38 am
A rocket test sled accelerates at a constant rate of 15 m/s2 from rest while moving along a straight track. The rocket engine turns off instantly when the sled reaches a speed 30 m/s. The sled then moves freely (acceleration = 0) for a period of 7 s, after which the brakes are automatically applied giving a constant deceleration of -25 m/s2. What is the total time that the sled is moving?