Question

a ball is thrown vertically upward and it reaches a height of 90 metre.Find the velocitywith which it was thrown?​

Answer 1

Explanation:

Since the motion of the ball is linear under “constant acceleration”(~9.8ms^2),the basic equations of motion can be employed. u ~ 42 m/s (assuming air resistance is negligible). A ball is thrown vertically upwards with an initial velocity 36m/s.

Answer 2

Answer:

42.42 m/s

Explanation:

v^2 = u^2 + 2as

0 = u^2 -2*10*90

u = √1800

= 30√2

= 1.414 * 30

= 42.42 m/s