Oscillations · Question 37

Which one of the following equations of motion represents simple harmonic motion ? where k, k0, k1 and a are all positive.

1. Acceleration = -k(x + a)
2. Acceleration = k(x + a)
3. Acceleration = - 2x
4. Acceleration = -k0x + k1x2

Two simple harmonic motions of angular frequency 100 and 1000 rad s-1 have the same displacement amplitude. The ratio of their maximum acceleration is

1. 1 : 103
2. 1 : 104
3. 1 : 10
4. 1 : 102

A point performs simple harmonic oscillation of period T and the equation of motion is given by x = a ( t + /6). After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity?

1. T/3
2. T/12
3. T/8
4. T/6

A particle executes simple harmonic oscillation with an amplitude a. The period of oscillation is T. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is

1. T/8
2. T/12
3. T/2
4. T/4

A mass of 2.0 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes a simple harmonic motion. The spring constant is 200 N/m. What should be the minimum amplitude of the motion so that the mass gets detached from the pan (take g = 10 m/s2). [figure]

1. 10.0 cm
2. any value less than 12.0 cm
3. 4.0 cm
4. 8.0 cm

The particle executing simple harmonic motion has a kinetic energy K0 2 t. The maximum values of the potential energy and the total energy are respectively

1. K0/2 and K0
2. K0 and 2K0
3. K0 and K0
4. 0 and 2K0

The phase difference between the instantaneous velocity and acceleration of a particle executing simple harmonic motion is

2. 0.707
3. zero
4. 0.5

A rectangular block of mass m and area of cross-section A floats in a liquid of density . If it is given a small vertical displacement from equilibrium it undergoes oscillation with a time period T, then

1. T 1 m
2. T
3. T 1 A
4. T 1

The circular motion of a particle with constant speed is

1. periodic but not simple harmonic
2. simple harmonic but not periodic
3. periodic and simple harmonic
4. neither periodic nor simple harmonic

A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 31.4 cm/s. The frequency of its oscillation is

1. 4 Hz
2. 3 Hz
3. 2 Hz
4. 1 Hz