A particle B of mass 5 kg is attached to a frictionless pivot A by a thread of length d = 0.2 m so that B hangs freely. At some instant of time a strong wind begins to apply a constant horizontal force F = 100 N to B, as a result it rotates about A in a vertical plane. Find the speed (in m/s) of B at the instant when the string is horizontal `(g = 10 m/s^(2))`

In a dumbbell having two small spheres each of mass 2M connected by a massless rod of length d . Sphere A is attached to a frictionless pivot so that B hangs freely,vertically.At some instant of time,a strong wind begins to apply a constant horizontal force F on B .Dumbbell rotates about A in vertical plane.Speed of B at the instant when dumbbell in horizontal is sqrt((Fd-2Mgd)/(xM)) .Find x

A mass of 5 kg is tied to a string of length 1.0 m is rotated in vertical circle with a uniform speed of 4 m//s . The tension in the string will be 170 N when the mass is at (g=10 m//s^(2))

A mass of 5 kg is tied to a string of length 1.0 m and is rotated in vertical circle with a uniform speed of 4m//s . The tension in the string will be 130 N when the mass is at (g= 10 m//s^2 )

A rod AB with mass of 2kg at B is held in horizontal position due to a force F as shown.The rod is free to rotate about A.Then F in N is?

A particle of mass 2sqrt(5) Kg is having velocity vec v=(2hat i+hat j)m/s " and acceleration vec a=(hat j-hat i)m/s^(2) " at some instant of time. At same instant find component of net force (in N) parallel to velocity.

A particle of mass m=2 kg is suspended in a vertical plane by two strings - one horizontal and the other inclined to the vertical by alpha = 30^(@) . Find the tension of the inclined string (a) an instant before the horizontal one is cut, (b) an instant after the horizontal one is cut.

Two particles of masses m and 2m are attached to the massless rod of length 2l as shown in figure. The rod is hinged at its midpoint O and is free to rotate in vertical plane about hinge. The minimum speed v at the given instant so that it can complete the circle.