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A ball is thrown vertically upwards from the top of a tower at 4.9 ms. it strikes the pond near the base of the tower after 3 seconds The height of the is Take g = 9.8 m/s

A ball is thrown vertically upwards from the top of a tower at 4.9 ms. it strikes the pond near the base of the tower after 3 seconds The height of the is Take g = 9.8 m/s

Grade:9

1 Answers

Sai Ashish Vure
26 Points
4 years ago
Using s = ut + (1/2)at^2, with downwards as positive,
s = (-4.9m/s * 3s) + (1/2) * 9.8m/s^2 * (3s)^2
s = -14.7m + 4.9m/s^2 * 9s^2
s = -14.7m + 44.1m
s = 29.4m
Hence, the height of the tower is 29.4m.

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