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Q.

Figure shows four blocks that are being pulled along a smooth horizontal surface. The masses of the blocks and tension in one cord are given. The pulling force F is :

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a

200 N

b

125 N

c

50 N

d

100 N

answer is D.

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Detailed Solution

ax=Fcos60°M=F2×10=F20

Thus 30=2+1×F20

∴ F=200 N

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