Asked by kinematics
An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +40 ft/s2. After some time t1, the rocket engine is shut down and the sled moves with constant velocity v for a time t2. If the total distance traveled by the sled is 17 500 ft and the total time is 90 s, find the times t1 and t2
Answers
Answered by
drwls
t1 + t2 = 90
(1/2)a*t1^2 + a*t1*t2 = 17,500
You know that a = 40. That leaves you with two equations in two unknowns to solve.
(1/2)a*t1^2 + a*t1*t2 = 17,500
You know that a = 40. That leaves you with two equations in two unknowns to solve.
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