Two wooden blocks are moving on a smooth horizontal surface such that the block of mass $m$ remains stationary with respect to block of mass $M$ as shown in the figure. The magnitude of force $P$ is
$(M + m)g\,tan\beta $
$g\,tan\beta $
$mg\,cos\beta $
$(M + m)g\,cosec\beta $
Two blocks $'A$' and $'B'$ each of mass $'m'$ are placed on a smooth horizontal surface. Two horizontal force $F$ and $2F$ are applied on the $2$ blocks $'A'$ and $'B'$ respectively as shown in figure. The block $A$ does not slide on block $B$. Then the normal reaction acting between the two blocks is
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 ..........
What is the acceleration of $3 \,kg$ mass when acceleration of $2 \,kg$ mass is $2 \,m / s ^2$ as shown is ............... $m / s ^2$
A wooden wedge of mass $M$ and inclination angle $(\alpha)$ rest on a smooth floor. A block of mass $m$ is kept on wedge. A force $F$ is applied on the wedge as shown in the figure such that block remains stationary with respect to wedge. So, magnitude of force $F$ is
In the following figure, the object of mass $m$ is held at rest by a horizontal force as shown. The force exerted by the string on the block is