List of top Physics Questions on Work done

A particle of mass \(M\) moves along the horizontal \(x\)-axis from \(x=0\) to \(x=L\). The coefficient of kinetic friction varies as \[ \mu_k(x)=\frac{\mu_0}{L}x \] where \(\mu_0\) and \(L\) are constants. If the total work done by friction during the motion is \[ -\frac{\mu_0 MgL}{n} \] where \(g\) is the acceleration due to gravity, find \(n\).

A 1 kg block subjected to two simultaneous forces \((2\hat{i} + 3\hat{j} + 4\hat{k})\) N and \((3\hat{i} - \hat{j} - 2\hat{k})\) N is moved a distance of 25 m along \((3\hat{i} - 4\hat{j})\) direction. The work done in this process is ______ J.

A closed circular tube of average radius 15 cm, whose inner walls are rough, is kept in vertical plane. A block of mass 1 kg just fit inside the tube. The speed of block is 22 m/s, when it is introduced at the top of tube. After completing five oscillations, the block stops at the bottom region of tube. The work done by the tube on the block is J. (Given: g = 10 ms⁻²)

A gas is taken through the cycle A⇢B⇢C⇢A ,as shown. What is the net work done by the gas?