A plank of mass m1=8 kg with a bar of mass m2=2 kg placed on its rough surface, lie on smooth floor of elevator ascending with an acceleration g4. The coefficient of friction is μ=15 between m1 and m2. A horizontal force F=30 N is applied to the plank. Then the acceleration of bar and the plank in the reference frame of elevator are: (g=10 m/s2)

A plank of mass m1=8 kg with a bar of mass m2=2 kg placed on its rough

1.	A plank of mass m1=8 kg with a bar of mass m2=2 kg placed on its rough surface, lie on smooth floor of elevator ascending with an acceleration g4. The coefficient of friction is μ=15 between m1 and m2. A horizontal force F=30 N is applied to the plank. Then the acceleration of bar and the plank in the reference frame of elevator are: (g=10 m/s2)
Answer» A plank of mass $m_{1} = 8 k g$ with a bar of mass $m_{2} = 2 k g$ placed on its rough surface, lie on smooth floor of elevator ascending with an acceleration $\frac{g}{4}$ . The coefficient of friction is $μ = \frac{1}{5}$ between $m_{1}$ and $m_{2}$ . A horizontal force $F = 30 N$ is applied to the plank. Then the acceleration of bar and the plank in the reference frame of elevator are: ( $g = 10 {m/s}^{2})$

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