please explain the answer and approach in detail. Two very small balls A and B o

Question

please explain the answer and approach in detail.

Two very small balls A and B of masses 4.0 kg and 5.0 kg are affixed to the ends of a light inextensible cord that passes through a frictionless ring of radius negligible compared to the length of the cord. The ring is fixed at some height above the ground. Ball A is pulled aside and given a horizontal velocity so that it starts moving on a circular path parallel to the ground, keeping ball B in equilibrium as shown. Speed of the ball A is closest to (1) 2.5 m/s (3) 4.0 m/s (4) M (2) 3.0 m/s ore information is required to decide.

Explanation / Answer

Tension=mB*9.8=49 N

Tension=T=49

Tcos(theta)=mA*9.8

cos(theta)=36.8 degree

Tsin(theta)=mA*v*v/r

v=3.8m/s

Option(3) is correct

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