Two blocks of masses 2kg and 4kg are arranged as shown in figure. Then, find the maximum value of force F, for which both blocks will move together.
A
10N
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B
30N
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C
20N
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D
40N
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Solution
The correct option is B30N For maximum value of force F, let two blocks move together with acceleration a. First take two blocks as system: The acceleration of the system will be, a=F2+4=F6m/s2
Now from FBD of 2kg block:
The maximum frictional force will act on block, to avoid slipping on the surface.