6.The time period of particle executing SHM is doubles, then:

7.A simple pendulum is made of a bob which is a hollow sphere full of mercury suspended by means of a wire. If a little mercury is drained off, the period of the pendulum will:

8.A particle executes SHM along a straight line so that its period is 12 s. The time it takes in traversing a distance equal to half its amplitude from its equilibrium position is:

9.In simple harmonic motion, the particle is:

10.A mass M is suspended from a spring of negligible mass. The spring is pulled a little and then released, so that the mass executes SHM of time period T. If the mass is increased by m, the time period becomes 5T/3. Then the ratio of m/M is: