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Question

Two blocks P and Q are connected by a string, which passes over a pulley as shown in the figure. The block P is sliding on an included surface. Ignoring the masses of the string and the pulley the tension in the string is (use gravitational acceleration g =9.81 m/s2 and neglect all friction)


A
55.2 N
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B
62.5 N
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C
74.3 N
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D
86.2 N
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Solution

The correct option is A 55.2 N


Given data:

m1=6kg,m2=10 kg

6g cos60+T=6a

3g+T=6.......(1)

10 gT=10 a......(2)

From equation (1) &(2)

a=7g16

T=g(107016)=90g16=55.2N

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