Question

A ball is thrown vertically upwards reaches its maximum height in 4 seconds find the velocity with which it was thrown up and the maximum height it reaches

Answer 1

Time, t = 4 sec

Final velocity, v = 0 m/s

Acceleration, a = -9.8 m/s²

v = u + at

0 = u - 9.8(4)

u = 39.2 m/s

v² - u² = 2as

0 - (39.2)² = 2(-9.8)s

s = (39.2)²/19.6

s = 78.4 m

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