A ball released from rest at time t = 0 hits the ground. If it rebounds inelastically with a velocity 5 m/s and reaches the top at t = 1.5 s, then what is the displacement of the ball from its initial position after 1.5 s (g=10 $m/s^2$)?

1. 6.25 m

2. 1.25 m

3. 3.75 m

4. 5 m

Q. A ball released from rest at time $t=0$ hits the ground. It rebounds in elastically with a velocity $5m{s}^{-1}$ and reaches the top at $t=1.5s$, what is the net displacement of the ball from its initial position after $1.5s$? $(g=10m{s}^{-2})$

Q. Two balls $A$ and $B$ are placed at the top of $180m$ tall tower. Ball $A$ is released from the top at $t=0s$. Ball $B$ is thrown vertically down with an initial velocity $u$ at $t=2s$. After a certain time, both balls meet $100m$ above the ground. Find the value of $u$ in $m{s}^{-1}$ [ use $g=10m/s^2$ ]

Q. A ball is released from the top of a tower of height $h$ m. It takes $T$ s to reach the ground. What is the position of the ball in $\frac{T}{3}$ s?

Q. A ball was thrown from height $H$ and the ball hits the floor with velocity $10(\hat{i}-\hat{j})\text{m/s},$ $1.5$ sec after its projection. Find initial speed of ball.

Q. A helicopter is rising up from ground with an acceleration of $g{\text{m/s}}^2$, starting from rest after raising a height $h$ it attains a velocity of $v\text{m/s}$. At this instant, a particle is now released from the helicopter. Take $t=0$ at releasing time, calculate the time $t$ when particle reaches to the ground.