A uniform beam of weight 100 N is 4 m long and is supported 1.0 m from one end. A load of weight wN hangs from that ened and the beam is in equilibrium.What is the value of w?
A body of mass M kg is lifted by a man to a height of one metre in 30 s. Another man lifts the same mass to the same height in 60 s.The work done by them is in ratio