Question

A ball thrown vertically upwards returns to its starting point in 4 sec .find initial velocity

Answer 1

Answer:

t = 4s

v = 0m/s

g = -10m/s [ taken ]

u = ?

u = 40m/s

Explanation:

v = u + gt.

0m/s = u + (-10m/s^2) * 4s

- u = -40m/s

u = 40m/s