Engineering Mec...

A bullet of mass 20 gm is fixed from a gun of mass 15 kg. If the speed of bullet is 650 m/s, then the recoil velocity of gun is

A varying force F = (3t² + 2t + 4) N, (t in sec) acts on a mass of 3 kg. Calculate the velocity if the force acts on mass from t = 1s to t = 5s and the initial velocity is 5 m/s

A horizontal disc is rotating about a vertical axis passing through center with angular velocity of 6π rad/s. A small piece of wax of mass 20 gram falls vertically on disc and sticks at a distance of 10 cm from axis. If angular velocity gets reduced to 5π rad/s, Moment of inertia (gm-m²) of disc is____

A glass marble drops from a height of 3 metres upon a horizontal floor. If the co-efficient of restitution be 0.9, what is the height to which it rises after impact?