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A block of mass 10 kg is held at rest against arough vertical wall [u 0.5] under the action aforce F as shown in figure. The minimum value ofF required for it is (g 10 m/s2)30.10 kg30°(1) 162.6N(3) 42.7 N2) 89.7 N(4) 95.2 N |
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