Equilibrium of concurrent forces
Forces acting at the same point on a body are called concurrent forces. When a number of forces act on a body at the same point and the net unbalanced force is zero, the body will continue in its state of rest or of uniform motion along a straight line and is said to be in equilibrium.
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Numerical Problems Based on Class 11 Physics Equilibrium of Concurrent Forces with Answers
Q.1. A mass of 2U kg is suspended by a rope of length 2 m from a ceiling. A force of 173.2 N in the horizontal direction is applied at the midpoint of the rope as shown in Figure. What is the angle the rope makes with the horizontal in equilibrium? Take g = 10 ms-2. Neglect mass of the rope.
(Ans. 30°)
Q.2. A mass of 10 kg is suspended vertically by a rope of length 2 m from a ceiling. A force of 60 N is applied at the middle point of the rope in the horizontal direction, as shown in Figure. Calculate the angle the rope makes with the vertical. Neglect the mass of the rope and take g = 10 ms-2.
(Ans. 31°)
Q.3. A body of weight 200 N is suspended with the help of strings as shown in Figure. Find the tensions T1 and T2.
(Ans. T1 = 146.4 N, T2 = 179.3 N)
