A wedge of height $H$ (fixed) and inclination $\alpha $ (variable) is moving on a smooth horizontal surface with constant acceleration $g\ m/s^2$ . A small block is placed at bottom of incline as shown in figure, slips on the smooth surface of incline . Choose $CORRECT$ statement about time taken by block to reach the top of incline
Time taken increases with $\alpha $ for $0 < \alpha < \frac{\pi }{4}$
Time taken first increases then decreases with $\alpha $ for $0 < \alpha < \frac{\pi }{4}$
Time taken first decreases then increases with $\alpha $ for $0 < \alpha < \frac{\pi }{4}$
Time taken decreases with $\alpha $ for $0 < \alpha < \frac{\pi }{4}$
Arrangement of two block system is as shown. The net force acting on $1 \,kg$ and $2 \,kg$ blocks are (assuming the surfaces to be frictionless) respectively
The tension in the string which connected the blocks as shown in the following figure ............ $ N$
A trolley is falling freely on inclined plane as shown in the figure. The angle of string of pendulum with the ceiling of trolley is $(\alpha)$ equal to ..........
A block $B$ is placed on block $A$. The mass of block $B$ is less than the mass of block $A$. Friction exists between the blocks, whereas the ground on which the block $A$ is placed is taken to be smooth. $A$ horizontal force $F$, increasing linearly with time begins to act on $B$. The acceleration ${a_A}$ and ${a_B}$ of blocks $A$ and $B$ respectively are plotted against $t$. The correctly plotted graph is
$T_1$ and $T_2$ in the given figure are