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Intuition for COM

Two blocks of...

Question

Two blocks of mass m and 2m are connected as shown in figure. A force F is acting on the block of mass 4m. Pulley is massless and string is light and inextensible. All the surfaces are smooth.
Contact force between ground and the 4m mass under the previous problem condition is

A

mg

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B

3mg

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C

5mg

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D

7mg

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Solution

The correct option is D 7mg
N = 7 mg

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