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in Physics by (71.4k points)

From the top of a tower 100 m in height a ball is dropped and at the same time another ball is projected vertically upwards from the ground with a velocity of 25 m/s. Find when and where the two balls will meet ? (g = 9.8 m/s).

1 Answer

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For the ball chapped from the top

x = 4.9 t2      .....(i)

For the ball thrown upwards

100 – x = 25t – 4.9 t2      .....(ii)

From eq. (i) & (ii),

t =4s; x = 78.4 m

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