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A ball falls under gravity from a height of 10mwith an initial down ward velocity u. It colliders with the ground. Loss 50%of its energy in collision and then rises back to the same height. Find the initial velocity u. एक गेंद गुरुत्वाकर्षण वेग के साथ 10mकी ऊँचाई से नीचे गिरती है। यह जमीन से टकराता है। |
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Answer» HYY Dude Given : height h=10m Initial velocity = V° let m be the mass of BALL. Ball is projected downward with velocity V° from height h. Total energy =mgh +1/2mv°² Total Energy COLLISION = 50/100x mgh + 1/2 mv°² the ball rises back to same height after collision hence V°=√2gh =√2x9.8x 10 =14 m/s therefore initial velocity = 14m/s Hope it's helps you Plz marked in brainlest answer |
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