A circular object of radius r rolls without slipping on a horizontal level floor with the center having velocity $$V$. The velocity at the point of contact between the object and the floor is

In a statically determinate plane truss, the number of joints $$(j)$$ and the number of members $$(m)$$ are related by

A two member truss ABC is shown in the figure. The force (in kN) transmitted in member AB is ________

A mass m₁ of 100kg travelling with a uniform velocity of 5 m/s along a line collides with a stationary mass m₂ of 1000kg. After the collision, both the masses travel together with the same velocity. The coefficient of restitution is