Question

A body projected vertically up with a velocity of 20m returns to the ground with a velocity of 18m the maximum height attained by the body is

Answer 1

Answer:

Explanation:

Thrown with a velocity of 10 m/s, if it reaches a height of 20 m, the g at that place must be g = v^2/ 2h = 100/ 40 = 2.5m/s^2

Thrown with a velocity of 20 m/s,it will reach a height of

h = v^2/(2g) = 400/5= 80 m

Or simply ,

H2 = ( v2/v1)^2*H1=4 *20 = 80m