A thin plank of mass `M` and length `l` is pivoted at one end. The plank is releaed at `60^(@)` from the vertical. What is the magnitude and direction of the force on the pivot when the plank is horizontal?

A thin plank of mass m and length l is pivoted at one end and it is held stationary in horizontal position by means of a light thread as shown in the figure then find out the force on the pivot.

A girl jumps from a height h on the end of a see-saw. The see-saw consists of a uniform plank of length I pivoted at its centre. The plank is horizontal before the girl jumps. The mass of the see-saw is twice the mass of the girl. Find the angular velocity of the plank just after the girl jumps on the plank.

A girl jumps from a height h on the end of a see-saw. The see-saw consists of a uniform plank of length I pivoted at its centre. The plank is horizontal before the girl jumps. The mass of the see-saw is twice the mass of the girl. Find the angular velocity of the plank just after the girl jumps on the plank.

Figure shown a small block A of mass m kept at the left end of a plank B of mass M = 2m and length l . The system can side on a horizontal rood. The system is started towards right with the initial velocity v . The friction coefficient between the rood and the plank is 1//2 and that between the plank and the block is 1//4 . Find (a) the time elapsed before the block separates from the plank (b) displacement of block and plank relative to ground till that moment.

A uniform wooden plank of mass 150 kg and length 8 m is floating on still water with a man of 50 kg at one end of it . The man walks to the other end of the plank and stops. Than the distance covered by the plank is

A uniform wooden plank of mass 150 kg and length 8 m is floating on still water with a man of 50 kg at one end of it . The man walks to the other end of the plank and stops. Than the distance covered by the plank is

A block of mass 1 kg is placed over a plank of mass 2 kg. The length of the plank is 2m. Coefficient of friction between the block and the plank is 0.5 and the ground over which plank is placed is smooth. A constant force F = 30 N is applied on the plank is horizontal direction. The time after which the block will separate from the plank is 73xx10^(-x)S the value of x is : (g = 10 m//s^(2))

A mass M=40kg is fixed at the very edge oa a long plank of mass 80kg and length 1 m which is privoted such that it is in equilibrium. How far (approx.) from the pivot should a mass of 100kg be attached so that the plank starts rotating with an angular acceleration of 1 "rad"//s^(2) ?

Figure shown a small block A of mass m kept at the left end of a plank B of mass M = 2m and length l . The system can slide on a horizontal road. The system is started towards right with the initial velocity v . The friction coefficient between the road and the plank is 1//2 and that between the plank and the block is 1//4 . Find (a) the time elapsed before the block separates from the plank (b) displacement of block and plank relative to ground till that moment.