In the graph shown in figure, which quantity associated with projectile motion is plotted along $y$-axis?

A ball is rolled off along the edge of a horizontal table with velocity $4 m/s$. It hits the ground after time $0.4 \,\,s$. Which of the following are correct?

A particle moves in a circle of radius $R$, with a constant speed $v$. Then, during a time interval $[\pi R/3v]$, which of the following is true?

What do you mean by projectile motion and projectile particle ? Find the value of the position of a projectile particle at any instant of time.

A particle is moving along the $x-$axis with its coordinate with the time '$t$' given be $\mathrm{x}(\mathrm{t})=10+8 \mathrm{t}-3 \mathrm{t}^{2} .$ Another particle is moving the $y-$axis with its coordinate as a function of time given by $\mathrm{y}(\mathrm{t})=5-8 \mathrm{t}^{3} .$ At $\mathrm{t}=1\; \mathrm{s},$ the speed of the second particle as measured in the frame of the first particle is given as $\sqrt{\mathrm{v}} .$ Then $\mathrm{v}$ (in $\mathrm{m} / \mathrm{s})$ is