A block A of mass $$100$$ kg rests on another block B of mass $$200$$ kg and is tied to a wall as shown in the figure. The coefficient of friction between A and B is $$0.2$$ and that between B and the ground is $$0.3$$. The minimum force F required to move the block B is (Take$$, $$9$$ $$=$$ $$10$$ $$ms-2)

Question

A block A of mass $$100$$ kg rests on another block B of mass $$200$$ kg and is tied to a wall as shown in the figure. The coefficient of friction between A and B is $$0.2$$ and that between B and the ground is $$0.3$$. The minimum force F required to move the block B is (Take$$, $$9$$ $$=$$ $$10$$ $$ms-2)

Infinity Learn · Accepted Answer

Friction force between block A and block B; and between block B and surface will oppose the force F.∴   $$F=FAB+FBS=$$μ$$ABmAg+$$μ$$BSmA+mBg=0.2$$×$$100$$×$$10+0.3(100+200)10=200+900=1100$$ NThis is the required minimum force to move the block B.

A block A of mass 100 kg rests on another block B of mass 200 kg and is tied to a wall as shown in the figure. The coefficient of friction between A and B is 0.2 and that between B and the ground is 0.3. The minimum force F required to move the block B is (Take, 9 = 10 $m s^{- 2}$ )

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A block A of mass 100 kg rests on another block B of mass 200 kg and is tied to a wall as shown in the figure. The coefficient of friction between A and B is 0.2 and that between B and the ground is 0.3. The minimum force F required to move the block B is (Take, 9 = 10 ms-2)

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A block A of mass 100 kg rests on another block B of mass 200 kg and is tied to a wall as shown in the figure. The coefficient of friction between A and B is 0.2 and that between B and the ground is 0.3. The minimum force F required to move the block B is (Take, 9 = 10 $m s^{- 2}$ )