Two bodies of mass 4kg and 6 kg are attached to the ends of a string passing over a pulley as shown in the figure below. The 4 kg mass is attached to the tabletop by another string. The tension in this string T1 is equal to (take g=10ms2 )
A
20 N
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B
25 N
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C
10.6 N
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D
10 N
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Solution
The correct option is A20 N Let us first draw the free body diagrams of bodies of masses 6 kg and 4 kg
We get, T=60 N;
From the figure, T=T1+40⇒60=T1+40⇒T1=20 N