1a) Marty McFly needs to go 88 mph (39.3 m/s) to jump back to the future....

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Physics

1a) Marty McFly needs to go 88 mph (39.3 m/s) to jump back tothe future. He is riding his hoverboard holding onto the side of avery very short train, which is chugging faster and faster towardthe edge of a cliff (on a flat horizontal). If the cliff is 24 mtall and the train hits the ground 95 m from the base of the cliff,did Marty make it back to the future (how fast was the train goinghorizontally the moment it left the cliff?)?
1b) Is it possible that Martyâ€™s SPEED increased AFTER the trainleft the tracks and went over the cliff? Explain. Bonus: WhatTHEOREM might you use to figure out his SPEED right before he hitthe ground? (Or explain how you would find his final speed)
1c) Could the horizontal component of his velocity haveincreased during the fall?
Please write it clearly and label the answers

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4.0 Ratings (659 Votes)

1alet us consider that the train hits the ground t secs afterjumping from the cliffhere the initial vertical speed Uy0 and the acceleration is thegravitational acceleration g hence we can See Answer

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