A planar object made up of a uniform square plate and four semicircular discs of the same thickness and material is being acted upon by four forces of equal magnitude as shown in Fig. The coordinates of point of application of forces is given by

A sufficiently long plane of mass 4kg is placed on a smooth horizontal surfaces A small block of mass 2kg is placed over the plank and is being acted upon by a time varying horizontal force F = (0.5t) where F is in newton and t is in second as shown in figure. The coefficient of friction slipping the plank and the block is given is mu_(s) = mu_(k) = mu , at time t = 12s the relative slipping between the plank and the block is just likely to occur The coefficient of friction mu is equal to

Four coplanar forces are applied at a point O. Each of them is equal to k and the angle between consecutive forces equals 45^(@) as shown in the figure.Then the resultant has the magnitude equal to:

Four forces of the same magnitude act on a square as shown in figure. The square can rotate about point O , mid point of one of the edges. The force which can produce greatest torque is

Four forces of the same magnitude act on a square as shown in figure. The square can rotate about point O , mid point of one of the edges. The force which can produce greatest torque is

Four uniform wires of the same material are stretched by the same force. The dimensions of wire are as given below. The one which has the minimum elongation has:

Three force are applied to a square plate as shown in the figure. Find the magnitude, direction and point of application of the resultant force if this point is taken on the side BC .