First slide
Vertical projection from top of a tower
Question

A stone is thrown vertically upward with a velocity of 10 m/s. If the stone hits the ground after 5 second, the height of the tower is (Take g=10m/s2)

Easy
Solution

Considering vertically upward physical quantities negative and vertically downward physical quantities positive, we can write h=ut+12gt2=10×5+12×10×52m=75m

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