11.A stone of mass 0.3 kg attached to a 1.5 m long string is whirled around in a horizontal circle at a speed of 6 m/s. The tension in the string is:

12.Which of the following statements is false for a particle moving in a circle with a constant angular speed?

13.Which of the following statements about the centripetal and centrifugal forces is correct?

14.The string of a pendulum is horizontal. The mass of bob attached to it is m. Now the string is released. The tension in the string in the lowest position, is:

15.Let ? denote the angular displacement of a simple pendulum oscillating in a vertical plane. If the mass of the bob is m, the tension in the string is mg cos ?: