A uniform wooden plank, 5 m long and mass of 40 kg, is resting horizontally on two supports 0.5 m from each end. A boy weighing 45 kg stands on the plank, 1.5 m from one end. Find the reaction at the supports.

A 2 m long wooden plank of mass 20 kg is pivoted (supported from below) at 0.5 m from either end. A person of mass 40 kg starts walking from one of these pivots to the farther end. How far can the person walk before the plank topples?

Two boys are sitting very close to each other at a distance of 0.5 m from each other.If the mass of one boy is 40 kg and other is 50 kg,find the fravitational force between them.

A uniform beam 1 m long is supported on knife-edge at 60 cm from left end. A mass of 100 g is suspended at a distance of 50 cm and a mass of 50 g is suspended at 20 cm from same end. From where should the mass of 200 g be suspended so that beam will remain horizontal. Also find normal reaction at the support.

Two men are carrying a uniform beam of mass 200 kg of length 10 m on their shoulders. If one man is at 1 m from one end and other is 2 m from other end, find the load supported by each.

A steel bar AB of mass 10 kg and length 1 m is kept horizontal by supporting it at the two ends. Two weights of 4 kg and 6 kg are suspended from points of the bar at distances 30 cm and 80 cm respectively from the end A. The reaction at the end A is

Choose the correct options A steel bar AB of mass 10 kg and length 1 m is kept horizontal by supporting it at the two ends. Two weights of 4 kg and 6 kg are suspended from points of the bar at distances 30 cm and 80 cm respectively from the end A. The reaction at A is

Choose the correct options A uniform rod of mass 2 m is held horizontal by two sturdy, practically inextensible vertical strings tied at its ends. A boy of mass 3 m hangs himself at one third length of the rod. Ratio of the tension in the string close to the boy to that in the other string is

Swaralee takes 40 s to carry & bag weighing 20 kg to a height of 5 m. How much power has she used?

One kg mass tied at the end of the string 0.5 m long is whirled in a horizontal circle, the other end of the string being fixed. The breaking tension in the string is 50 N. Find the greatest speed that can be given to the mass.

A thin uniform rod 2m long has a mass of 0.6 kg. Find its moment of inertia and radius of gyration about an axis perpendicular to its length and passing through: one end