In the arrangements shown in figure, the pulleys are all massless. The load has a mass of 21 kg. the point P is moved by a distance of 2.5 cm. find the minimum work (in J) required to be done by the force.

A man carries a load of 5 kg on his head through a distance of 10 m. the minimum amount of work is done when he

A man carries a load of 5 kg on his head through a distance of 10 m. the minimum amount of work is done when he

In the arrangement shown in figure-2.124 pulley A and B are massless and the thread is inextensible. Mass of pulley C is equal to m. If friction in all the pulleys negligible, then :

In the arrangement shown in figure, pulley is smooth and massless and all the strings are light. Let F_(1) be the force exerted on the pulley in case (i) and F_(2) the force in case (ii). Then :

In the arrangement shown in figure, pulley is smooth and massless and all the strings are light. Let F_(1) be the force exerted on the pulley in case (i) and F_(2) the force in case (ii). Then :

The is an arrangement of pulleys as shown in figure. All the pulley are massless and frcitionless and the strings used are inextensible. Each of these springs have a spring constant k. We define the stiffness of the assembly k_(1) as the force required to be applied at point A for its unit displacement. Find k_(1) for n=2

The is an arrangement of pulleys as shown in figure. All the pulley are massless and frcitionless and the strings used are inextensible. Each of these springs have a spring constant k. We define the stiffness of the assembly k_(1) as the force required to be applied at point A for its unit displacement. Find k_(1) for n = 1

In the arrangement shown in fig. m_(1)=1kg, m_(2)=2 kg . Pulleys are massless and strings are light. For what value of M, the mass m_(1) moves with constant velocity.