Question

Two balls A and B weighing 7 N and 9 N are connected by a light cord. The system is suspended
(C) 670 N
(D) 300 N
from a fixed support by connecting the ball A with another light cord. The ball B is pulled aside by a
horizontal force 12 N and equilibrium is established. Angles u. and ß respectively are
12N
(A) 30 and 60° (B) 60 and 30° (C) 37º and 53°
(D) 53° and 37°
A girl pushes her physics book un against the horizontal coiling of honum​

Answer 1

Answer:

(C). 37° and 53°

Explanation:

Here,

Let u = α.

On balancing forces at A,

T1 sin α = T2 sin β ----------(Equation 1)

T1 cos α = T2 cos β + 7 -------(Equation 2)

On balancing forces at B,

T2 sin β = 12 N ----------(Equation 3)

T2 cos β = 9N ------------(Equation 4)

T1 cos α = 16

T1 sin α = 12

tan α = 3 / 4

.°. α = 37°

tan β = 4 / 3

.°. β = 53°

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