The figure shows the circular motion of a particle which is at the topmost point on the y-axis at t=0. The radius of the circle is B and the sense of revolution is clockwise.  The time period is indicated in the figure. The simple harmonic motion of the x-projection of the radius vector of the rotating particle P is:
                   

(1) x(t) = Bsin $\left(\frac{2\mathrm{\pi t}}{30}\right)$

(2) x(t) = Bcos $\left(\frac{\mathrm{\pi t}}{15}\right)$

(3) x(t) = Bsin $\left(\frac{\mathrm{\pi t}}{15}+\frac{\mathrm{\pi }}{2}\right)$

(4) x(t) = Bcos$\left(\frac{\mathrm{\pi t}}{15}+\frac{\mathrm{\pi }}{2}\right)$

A $1.00\times {10}^{-20} kg$ particle is vibrating with simple harmonic motion with a period of $1.00\times {10}^{-5} s$ and a maximum speed of $1.00\times {10}^3 m/s$. The maximum displacement of the particle from the mean position is:

(1) 1.59 mm

(2) 1.00 cm

(3) 10 m

(4) None of these

Which one of the following equations does not represent SHM, x = displacement, and t = time? Parameters a, b and c are the constants of motion.

(1) x = a sin bt

(2) x = a cos bt + c

(3) x = a sin bt + c cos bt

(4) x = a sec bt + c cosec bt

The bob of a simple pendulum of length L is released at time t = 0 from a position of small angular displacement. Its linear displacement at time t is given by :

(1) $X=a \sin 2\mathrm{\pi }\sqrt{\frac{\mathrm{L}}{\mathrm{g}}}\times \mathrm{t}$

(2) $X=a \cos 2\mathrm{\pi }\sqrt{\frac{\mathrm{g}}{\mathrm{L}}}\times \mathrm{t}$

(3) $X=a \sin \sqrt{\frac{\mathrm{g}}{\mathrm{L}}}\times \mathrm{t}$

(4) $X=a \cos \sqrt{\frac{\mathrm{g}}{\mathrm{L}}}\times \mathrm{t}$

A particle in SHM is described by the displacement function $x\left(t\right)=A \cos (\omega t+\varphi ), \omega =2\pi /T.$ If the initial (t = 0) position of the particle is 1 cm, its initial velocity is $\pi cm s^{-1}$ and its angular frequency is $\pi s^{-1}$, then the amplitude of its motion is:

(1) $\pi cm$

(2) 2 cm

(3) $\sqrt{2} cm$

(4) 1 cm

A particle starts SHM from the mean position. Its amplitude is 'a' and total energy E. At one instant its kinetic energy is 3E/4. Its displacement at this instant is :

(1) $y=a/\sqrt{2}$

(2) $y=\frac{a}{2}$

(3) $y=\frac{a}{\sqrt{3/2}}$

(4) y = a

A particle is vibrating in a simple harmonic motion with an amplitude of 4 cm. At what displacement from the equilibrium position, is its energy half potential and half kinetic?

(1) 1 cm

(2) $\sqrt{2} cm$

(3) 3 cm

(4) $2\sqrt{2} cm$

A body of mass 500 g is attached to a horizontal spring of spring constant 8 ${\mathrm{\pi }}^2{\mathrm{Nm}}^{-1}.$ If the body is pulled to a distance of 10 cm from its mean position, then its frequency of oscillation is :

(1) 2 Hz

(2) 4 Hz

(3) 8 Hz

(4) 0.5 Hz

Two springs of force constants k and 2k are connected to a mass m as shown below. The frequency of oscillation of the mass is:

(1) $\frac{1}{2\mathrm{\pi }}\sqrt{k/m}$

(2) $\frac{1}{2\mathrm{\pi }}\sqrt{2k/m}$

(3) $\frac{1}{2\mathrm{\pi }}\sqrt{\frac{3k}{m}}$

(4) $\frac{1}{2\mathrm{\pi }}\sqrt{\frac{m}{k}}$

A weightless spring that has a force constant k oscillates with frequency n when a mass m is suspended from it. The spring is cut into equal halves and a mass 2m is suspended from one part of the spring. The frequency of oscillation will now become:

1. n

2. 2n

3. $\frac{\mathrm{n}}{\sqrt{2}}$

4. $\mathrm{n}{\left(2\right)}^{1/2}$