A rocket is fired upward from the earth's surface such that it creates an acceleration of $20\, m/s^2$. If after $5\, s$ its engine is switched off, the maximum height of the rocket  from the earth's surface would be……$m$

Two bodies are held separated by $9.8\,m$ vertically one above the other. They are released simultaneously to fall freely under gravity. After $2\,s$, the relative distance between them is $…………\,m$

A stone dropped from the top of a tower is found to travel $\left(\frac{5}{9}\right)$ of the height of the tower during the last second of its fall. The time of fall is ……. $s$

A body falling freely under gravity passes two points $30\,m$ apart in $1\,s$ . From what point above the upper point it began to fall?……… $m$ (Take $g = 10\,m\,s^{-2}$ )

A food packet is dropped from a helicopter rising up with a velocity of $4\,ms^{-1}.$ The velocity of the packet after three second will be…….$ms^{-1}$