JEE Main 2019 (Online) 10th January Evening Slot | Simple Harmonic Motion Question 109 | Physics

A cylindrical plastic bottle of negligible mass is filled with 310 ml of water and left floating in a pond with still water. If pressed downward slightly and released, it starts performing simple harmonic motion at angular frequency $$\omega $$. If the radius of the bottle is 2.5 cm then $$\omega $$ is close to – (density of water = 10³ kg/m³).

2.50 rad s^$$-$$1

3.75 rad s^$$-$$1

5.00 rad s^$$-$$1

7.90 rad s^$$-$$1

JEE Main 2019 (Online) 10th January Evening Slot

MCQ (Single Correct Answer)

-1

A particle executes simple harmonic motion with an amplitude of 5 cm. When the particle is at 4 cm from the mean position, the magnitude of its velocity in SI units is equal to that of its acceleration. Then, its periodic time in seconds is -

$${{4\pi } \over 3}$$

$${3 \over 8}\pi $$

$${7 \over 3}\pi $$

$${{8\pi } \over 3}$$

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

-1

A particle is executing simple harmonic motion (SHM) of amplitude A, along the x-axis, about x = 0. When its potential Energy (PE) equals kinetic energy (KE), the position of the particle will be :

$${A \over 2}$$

$${A \over {2\sqrt 2 }}$$

$${A \over {\sqrt 2 }}$$

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

-1

A rod of mass 'M' and length '2L' is suspended at its middle by a wire. It exhibits torsional oscillations; If two masses each of 'm' are attached at distance 'L/2' from its centre on both sides, it reduces the oscillation frequency by 20%. The value of radio m/M is close to :

0.77

0.57

0.37

0.17

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