# Questions & Answers of Virtual Work

## Weightage of Virtual Work

Total 5 Questions have been asked from Virtual Work topic of Engineering Mechanics subject in previous GATE papers. Average marks 2.00.

A block R of mass 100 kg  is placed on a block S of mass 150 kg as shown in the figure.Block R is tied to the wall by a massless and  inextensible string PQ.If the coefficient of static friction for all surfaces is 0.4, the minimum force F (in n kN) needed to move the block S is

A block weighing 200 N is in contact with a level plane whose coefficients of static and kinetic friction are 0.4 and 0.2, respectively. The block is acted upon by a horizontal force (in newton) P=10t, where t denotes the time in seconds. The velocity (in m/s) of the block attained after 10 seconds is _______

A truck accelerates up a 10° incline with a crate of 100 kg. Value of static coefficient of friction between the crate and the truck surface is 0.3. The maximum value of acceleration (in m/s2) of the truck such that the crate does not slide down is _______