Question

What do you mean by motion under gravity a body is thrown vertically upward with initial velocity u derive an expression for the maximum height attained and the body and the time required to come back to its initial position?

Answer 1

Answer:

Explanation:

When a body is thrown upward, Gravitational force acts on it resulting of an acceleration due to gravity. When it reaches the maximum hieght, it's final velocity (v) becomes 0 as the acceleration due to gravity acts on it in the opposite direction. As we did not got t (time), we can use the third equations of motion that is V^2 - U^2 = 2AS.

In which V is final velocity, U is initial velocity, S is the (here) hieght, and A is (here) Acceleration due to gravity.

Answer 2

H=u^2/ 2g
At H, v=0, a=-g
v^2=u^2-2gH