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In the first stage of a two-stage rocket, the rocket is fired from the launch pad...

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Physics

In the first stage of a two-stage rocket, the rocket is firedfrom the launch pad starting from rest but with a constantacceleration of 3.50 m/s2 upward. At 25.0 s after launch, thesecond stage fires for 10.0 s, which boosts the rocket’s velocityto 132.5 m/s upward at 35.0 s after launch. This firing uses up allthe fuel, however, so after the second stage has finished firing,the only force acting on the rocket is gravity. Air resistance canbe neglected.

Part A

Find the maximum height that the stage-two rocket reaches abovethe launch pad.

the answer is 3090m

Part B

How much time after the stage-two firing will it take for therocket to fall back to the launch pad?

Part C

How fast will the stage-two rocket be moving just as it reachesthe launch pad?

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