A rectangular metal plate ABCD is supported by two hinges `P_(1)` and `P_(2)` so that it remains in equilibrium in vertical plane (with line AB vertical) as shown in the figure. The contact forces `R_(1)` and `R_(2)` exerted by hinges on the metal plate is best, depicted by

Two metal plates P and Q of same material are arranged as shown in the figure. If both the plates are uniformly heated through the same range of temperature, then

A uniform semicircular ring of mass m and radius r is hinged at end A so that it can rotate freely about end A in the vertical plane as shown in the figure. Calculate angle made by line AB with vertical in equilibrium position and time period of small oscillation of ring.

Two metal plates A and B are connected to cell of emf 2V is shown in the figure br Redraw the diagram and draw lines of forces to represent electric field.

A thin horizontal movable plate P is separated from two fixed horizontal plates P_1 and P_2 by two highly viscous liquids of coefficient of viscosity eta_(1) and eta_(2) as shown, where eta_2 = 4eta_(1) . Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is h, then the distance h1 of movable plate from upper fixed plate such that the movable plate can be moved with a constant velocity by applying a minimum constant horizontal force F on movable plate is (assume velocity gradient to be uniform in each liquid).

A thin horizontal movable plate P is separated from two fixed horizontal plates P_1 and P_2 by two highly viscous liquids of coefficient of viscosity eta_(1) and eta_(2) as shown, where eta_2 = 4eta_(1) . Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is h, then the distance h1 of movable plate from upper fixed plate such that the movable plate can be moved with a constant velocity by applying a minimum constant horizontal force F on movable plate is (assume velocity gradient to be uniform in each liquid).

A ring of mass 0.8 kg and radius 1m is hinged at a point on its periphery such that the hinge is at the same horizontal level as its centre. The ring in vertical plane and released. Find the force exerted (in N) by the hinge on the ring just after the release.

For the uniform 5 kg beam shown in figure-2.41(a), how large is the tension in the supporting cable and what are the components of the force exerted by the hinge on the beam ? Take g = 10 m//s^(2)