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Q.

A dynamometer D is attached to two blocks of masses 6 kg and 3 kg. Forces of 20 N and 10 N are applied on the blocks as shown is figure. The dynamometer reads ________N

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answer is 13.33.

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Detailed Solution

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As the accelerations are equal, (20−F)6=(F−10)4

Force (F)= =10×6+20×36+3

=60+609=1209=13.33 N

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