Period of a pendulum Quiz 1

Question 1

A simple pendulum of time period $$T$$ is taken inside a car moving with constant velocity $$50\,m/s$$ on a straight road. Assuming everything to be ideal, the time period of the pendulum inside the moving car

Accepted Answer

Remain same

Answer

Will increase

Answer

Will decrease

Answer

Data not sufficient

Question 2

For a simple pendulum, the time period is $$\pi $$ seconds. Its velocity is $$10	ext{ m/s}$$ at the instant when it crosses its mean position. The amplitude of oscillation is

Accepted Answer

$$5\,m$$

Answer

$$10\,m$$

Answer

$$1\,m$$

Answer

$$20\,m$$

Question 3

Two bobs of mass $${{m}_{1}}=10\,kg$$, $${{m}_{2}}=20\,kg$$ are oscillated about a fixed point. If the length of the string of bob $$\left( 1 \right)$$ is $${{\ell }_{1}}$$ and that of bob $$\left( 2 \right)$$ is $$\dfrac{{{\ell }_{1}}}{2}$$ , then the time period of oscillation would be

Accepted Answer

more for $${{m}_{1}}$$

Answer

more for $${{m}_{2}}$$

Answer

equal for both

Answer

None is current

Question 4

A simple pendulum oscillates about a common point. The pendulum has a mass of $$1\,kg$$ and an oscillation duration of $$2\pi $$ seconds. Velocity at the lowest point is $$100\,m/s$$. Then the maximum potential energy that the pendulum can store is.

Accepted Answer

$$5	imes {{10}^{3}}\,Joule$$

Answer

$${{10}^{4}}\,Joule$$

Answer

$$5\,	imes {{10}^{4}}\,Joule$$

Answer

$${{10}^{5}}\,Joule$$

Question 5

If the length of a pendulum doubles then its time period changes by $$20$$ seconds. The initial time period of pendulum is

Accepted Answer

$$40\sec $$

Answer

$$20\sec $$

Answer

$$60\sec $$

Answer

$$90\sec $$