Question

An object is thrown vertically upwards and rises to a height of 10 m. Calculate
(i) the velocity with which the object was thrown upwards and (ii) the time taken by the object to reach the highest point.

Answer 1

Correct Answer - `14 m//s, 1.43 s`
Here, `h=10, v=0,` at highest point, `u=?,t=?, g=-9.8m//s^(2)`
From `v^(2)-u^(2)=2 gh, 0-u^(2)=2(-9.8)10=196` or `u=sqrt196=14m//s`
`v=u+g t, 0=14-9.8t t=14/9.8=1.43s`