### Kinematics

goals
A small block of mass $M$ moves on a frictionless surface of an inclined plane, as shown in the figure. The angle of the incline suddenly changes from $60^o$ to $30^o$ at the point $B$. The block is initially at rest at $A$. Assume that collision between the block and the incline are totally inelastic.
In a velocity time graph, the negative slope indicates
A particle is projected from ground at an angle ${60}{o}$ with horizontal with a speed of $10\sqrt {3}\ m/s$ from point $A$  as shown. At the same time sufficient long wedge is made to move with constant velocity $10\sqrt {3}m/s$ towards right from point $A$ as shown.
The velocity $v$ of a particle moving along straight line is given in terms of time $t$ as $v=3({t}^{2}-t)$ where $t$ is in seconds and $v$ is in $m/s$.
A batter hits a baseball so that it leaves the bat with an initial speed $v_0=37.0$ m/s at an initial angle $\alpha_0=53.1^o$, at a location where $g=9.8$ $m/s^2$.