Question bank/JEE Main/Physics

A bob of mass m is connected to a spring of spring constant k and a
string which is fixed to the ceiling as shown in figure. Original length
of the spring is L and the bob rotates in a horizontal circle centred at
the fixed rod. Assuming the spring remains horizontal, then elongation
in the spring is

A[IMAGE] m k
L,

Show answer and solution▾

[IMAGE] T cos θ = mg... (1)
T sin θ + kx = mw2 (L + x)... (2)
from (1) and (2)
x =[IMAGE] TOPIC: CIRCULAR MOTION
SUB TOPIC: DYNAMICS

Source: Grass-G / P-03 Paper 1 (Physics) Eng. + Hindi 24-8-2020.docx