A rocket test sled accelerates at a constant rate of 15 m/s from rest while moving along a straight track. The rocket engine turns off instantly when the sled reaches a speed 29 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?

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A rocket test sled accelerates at a constant rate of 15 m/s from rest while moving along a straight
track. The rocket engine turns off instantly when the sled reaches a speed 29 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?
I
Transcribed Image Text:A rocket test sled accelerates at a constant rate of 15 m/s from rest while moving along a straight track. The rocket engine turns off instantly when the sled reaches a speed 29 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? I
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