A stone tied to the end of a string 80 cnr long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone ?

A stone tide to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 12 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone ?

A stone of mass 0.25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with a speed of 40 rev.//min in a horizontal plane. What is the tension in the string ? What is the maximum speed with which the stone can be whirled around if the string can withstand a maximum tension of 200 N ?

A stone of mass mtied to the end of a string revolves in a vertical circle of radius R. The net forces at the lowest and highest points of the circle directed vertically downwards are : [Choose the correct alternative] T_1 and v_1 denote the tension and speed at the lowest point. T_2 and v_2 denote corresponding values at the highest point.

A stone tied to one end of string is moved in a circle. How much work is done by the centripetal force in this circular motion ?

Take a piece of stone and tie it to one end of a rubber string or a spring balance. Suspend the 'stone by holding the balance or the string as shown in the figure. Note the elongation of the string or the reading on the spring balance due to the weight of the stone. Now, slowly dip the stone in the water in a container as shown. Observed what happens to elongation of the string or the reading on the balance. , -

A mass of 1 is tied to a string as shown in the figure. Find. the force exerted by the string on the mass.

Two bodies of masses 10kg and 20 kg respecively kept on a smooth, horizontal surface are tied to the ends of a lght string. A horizontal force F= 600 N is applied to (i) A (ii) B along the direction of string. What is the tension in the string in each case?

Take a piece of thread. Tie a small stone at one end. Hold the other end of the thread and whirl it round as shown. Note the motion of the stone. Release the thread. Again note the direction of motion of the stone.

A 14.5 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 2 rev//s at the bottom of the circle. The cross-sectional area of the wire is 0.065 cm^2 . Calculate the elongation of the wire when the mass is at the lowest point of its path.