11
MCQ (Multiple Correct Answer)
When a mass $m$ is connected individually to two springs $S_1$ and $S_2$, the oscillation frequencies are $v_1$ and $v_2$. If the same mass is attached to the two springs as shown in figure, the oscillation frequency would be
A
$v_1+v_2$
B
$\sqrt{v_1^2+v_2^2}$
C
$\left(\frac{1}{v_1}+\frac{1}{v_2}\right)^{-1}$
D
$\sqrt{v_1^2-v_2^2}$
12
MCQ (Multiple Correct Answer)
The rotation of earth about its axis is
A
periodic motion
B
simple harmonic motion
C
periodic but not simple harmonic motion
D
non-periodic motion
13
MCQ (Multiple Correct Answer)
Motion of a ball bearing inside a smooth curved bowl, when released from a point slightly above the lower point is
A
simple harmonic motion
B
non-periodic motion
C
periodic motion
D
periodic but not SHM
14
MCQ (Multiple Correct Answer)
Displacement versus time curve for a particle executing SHM is shown in figure. Choose the correct statements.
A
Phase of the oscillator is same at $t=0 \mathrm{~s}$ and $t=2 \mathrm{~s}$
B
Phase of the oscillator is same at $t=2 \mathrm{~s}$ and $t=6 \mathrm{~s}$
C
Phase of the oscillator is same at $t=1 \mathrm{~s}$ and $t=7 \mathrm{~s}$
D
Phase of the oscillator is same at $t=1 \mathrm{~s}$ and $t=5 \mathrm{~s}$
15
MCQ (Multiple Correct Answer)
Which of the following statements is/are true for a simple harmonic oscillator?
A
Force acting is directly proportional to displacement from the mean position and opposite to it
B
Motion is periodic
C
Acceleration of the oscillator is constant
D
The velocity is periodic