An ice sled powered by a rocket engine starts from rest on a large frozen lake a

Question

An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +46 ft/s^2. After some time t1, the rocket engine is shut down and the sled moves with constant velocity v for the time t2. If the total distance traveled by the sled is 17,600 ft and the total time is 90 s, find the following. (a) the times t1 and t2, (b) the velocity v.

At the 17,600-ft mark, the sled begins to accelerate at -17ft/s^2. (c) What is the final position of the sled when it comes to rest? (d) How long does it take to come to rest? (Give the amount of i=time after the sled begins to decelerate.

Explanation / Answer

v = a*t1 = 46*t1 D = ½a*t1² + v*(t2 - t1) ? 17600 = ½*46*t1² + (90 - t1)*(46*t1) by solving both equations u will get t1,t2,v simalarly with above formula u can get part2

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