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A stone is thrown vertically upwards with an initial velocity of 30meter per second from the top of a tower 20metes high find the time taken to reach the maximum height and the total time which elapses before it reaches the ground and gravity is 10meter per second .

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treasureotchie

Answer:

time taken to reach maximum height(t)=3seconds

Explanation:

1st equation of motion:v=u-gt ,but v=0 at maximum height.so 0=u-gt

t=u÷g where,u=30m/s,h=20m,g=10m/s square

so t=30÷10

t=3seconds

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