Question

A body is thrown horizontally with the speed of 10 m/s from the top of the building having height 20 m, then the time it will take to reach the ground while neglecting air friction is

Answer 1

Here,

U(y) = 0 | U(x) = 10
we need to calculate the time taken by the ball to touch the ground. It means we need to consider all the components of Y-direction

》U(y) = 0
》t = root(2h/g) = 2
》t = 2
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