A body, thrown upwards with some velocity, reaches the maximum height of $20\,m$. Another body with double the mass thrown up, with double initial velocity will reach a maximum height of……….$m$

A body is projected with a velocity $u$. It passes through a certain point above the ground after $t_1$ second. The time interval after which the body passes through the same point during the return journey is

A body falls from rest in the gravitational field of the earth. The distance travelled in the fifth second of its motion is………$m$ $(g = 10\,m/{s^2})$

If a stone is released from a ballon rising with acceleration $a$ at the instant when its velocity is $v$, then immediately after release, the acceleration and velocity of the stone are

A person sitting in the ground floor of a building notices through the window, of height $1.5 \;m ,$ a ball dropped from the roof of the building crosses the window in $0.1 \;s$. What is the velocity (In $m/s$) of the ball when it is at the topmost point of the window $?\left( g =10\, m / s ^{2}\right)$