MCQ
A simple pendulum executing $S.H.M.$ is falling freely along with the support. Then
  • A
    Its periodic time decreases
  • B
    Its periodic time increases
  • It does not oscillate at all
  • D
    None of these

Answer

Correct option: C.
It does not oscillate at all
c
(c) $ T = 2\pi \sqrt{\frac{l}{g}}$; for freely falling system effective $g = 0$
so $T = \infty $ or $n = 0$
It means that pendulum does not oscillate at all.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A particle of mass $100\,g$ is projected at time $t =0$ with a speed $20\,ms ^{-1}$ at an angle $45^{\circ}$ to the horizontal as given in the figure. The magnitude of the angular momentum of the particle about the starting point at time $t=2\,s$ is found to be $\sqrt{ K }\,kg\,m ^2 / s$. The value of $K$ is $............$ $\left(\right.$ Take $\left.g =10\,ms ^{-2}\right)$
The three processes in a thermodynamic cycle shown in the figure are : Process $1 \rightarrow 2$ is isothermal; Process $2 \rightarrow 3$ is isochoric (volume remains constant); Process $3 \rightarrow 1$ is adiabatic. The total work done by the ideal gas in this cycle is $10 \,J$. The internal energy decreases by $20 \,J$ in the isochoric process. The work done by the gas in the adiabatic process is $-20 \,J$. The heat added to the system in the isothermal process is .............. $J$
Round off the value $2.845$ to three significant figures.
An object of mass $5\, kg$ is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of $10\, N$ throughout the motion. The ratio of time of ascent to the time of descent will be equal to $\left[\right.$Use $g =10 \,ms ^{-2}]$
Two masses $M$ and $m$ are attached to a vertical axis by weightless threads of combined length $l$. They are set in rotational motion in a horizontal plane about this axis with constant angular velocity $\omega $. If the tensions in the threads are the same during motion, the distance of $M$ from the axis is
The momentum $p$ of an object varies with time $(t)$ as shown in figure. The corresponding force $(F)$-time $(t)$ graph is
In a rocket of mass $1000\, kg$ fuel is consumed at a rate of $40 \,kg/s$. The velocity of the gases ejected from the rocket is $5 \times {10^4}\,m/s$. The thrust on the rocket is
The scale on a steel meter rod is calibrated at $20^\circ C.$ What will be the error in the reading of $50\ cm$ at $27^\circ C?$ Take, $\alpha=1.2\times10^{-5}\ ^\circ\text{C}^{-1}.$
In which of the following cases forces may not be required to keep the
An $ L-$ shaped glass tube is just immersed in flowing water such that its opening is pointing against flowing water. If the speed of water current is $v$, then