a ball of mass 9 kg is suspended by 2 wires AT&T; LTE 7:46 PM a session.masterin

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a ball of mass 9 kg is suspended by 2 wires AT&T; LTE 7:46 PM a session.masteringphysics.com C Multiple Choice Question 6.12 A ball of mass 9 kg is suspended by two wires from a horizontal arm, which is attached to a vertical shaft, as shown in the figure. The shaft is in uniform rotation about its axis such that the linear speed of the ball equals 0 m/s. The rate of rotation is adjusted so that the tensions in the two wires are equal. The radial acceleration of the ball is closest to: Submit My Answers Give Up

Explanation / Answer

Gven that
mass = 9 kg

we find out
From the y-coordinate, we get
T1 + T2,

y - mg = 0
and

from the x-coordinate we get T2
y - mArad = 0 .

With T1 = T2 and T2,y = 0.6T2 and T2,x = 0.8T2  
we get

T2 + 0.6T2 = mg (1)
and
0.8T2 = mArad . (2)

Divided both equation (1)&(2)

Arad = g / 2

= (9.8 m/s^2 ) / 2

= 4.9 m/s^2.

Arad = 5 m/s^2

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