Question bank/JEE Main/Physics

A ball of mass 1 kg is at rest in position P by means of two light
strings OP and RP as shown in the figure. The string RP is now cut and
the ball swings upto a position Q. If θ = 60° and tension in the string
in position OP and OQ are T1 (Just before cutting) and T2 respectively,
then [IMAGE] is equal to

A1B2C3D4
1 kg OP RP
P RP Q

θ = 60° OP OQ T_1 ( )
T_2, [IMAGE]

Show answer and solution▾

T1 cos θ = mg........(i)
T2 = mg cos θ........(ii)
[IMAGE] = cos2 θ = 4
TOPIC: CIRCULAR MOTION
SUB TOPIC: DYNAMICS

Source: Grass-G / P-04 Paper 2 (Physics) Eng.+ Hindi 24-8-2020.docx