COMEDK 2025 Evening Shift | Elasticity Question 1 | Physics

A wire of negligible mass having uniform area of cross section ' A ' and young modulus ' Y ' is used to suspend a point mass ' m '. The point mass executes simple harmonic motion in a vertical plane with a period ' T ', then the length of the wire is :

$L=\frac{T Y^2 A}{4 \pi^2 m}$

$L=\frac{T^2 Y A}{4 \pi m^2}$

$L=\frac{T Y^2 A}{4 \pi m^2}$

$L=\frac{T^2 Y A}{4 \pi^2 m}$

COMEDK 2025 Evening Shift

MCQ (Single Correct Answer)

-0

Select the correct statement from the following:

Shear modulus of an ideal liquid is infinite

Rubber is more elastic than steel

The bulk modulus of a perfect rigid body is infinite

The bulk modulus of an ideal liquid is zero

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

One end of a nylon rope of length 1 and diameter 10 mm is fixed to free limb. A monkey weighing 100 N jumps to catch the free end and stays there. The change in diameter of the rope is (Young's modulus of the wire is Y and Poisson Ratio is $\sigma$ )

$\frac{4000 \sigma}{\pi Y}$

$\frac{400 \sigma}{\pi Y}$

$\frac{40000 \sigma}{\pi Y}$

$\frac{40000 \pi}{\sigma Y}$

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

The temperature of a wire is doubled. The Young's modulus of elasticity

Will decrease

Will also double

Will become four times

Will remain the same

COMEDK Subjects