In the given figure the blocks A ,B and C weigh 4 kg ,6 kg and 8 kg respectively. The co-efficient of sliding friction between any two surfaces is 0.5. The force F required to slide the block C with…

Question

In the given figure the blocks A ,B and C weigh 4 kg ,6 kg and 8 kg respectively. The co-efficient of sliding friction between any two surfaces is 0.5. The force F required to slide the block C with constant speed is \_ \_ \_ \_ N. (Use g=10 m/s^2 )

Accepted Answer

Correct answer: 210. (210) For the 8 kg block (C) to move with constant velocity, F_ net=0. Friction forces acting: • Between C and ground: f= (m_A+m_B+m_C)g=0.5 (4+6+8) 10=90 N • Between C and B: f= (m_A+m_B)g=0.5 (4+6) 10=50 N For the 6 kg block (B): T=f_B on ground+f_A onB T= (m_A+m_B)g m_Bm_A+m_B+ m_A g T=20+50=70 N For the 8 kg block (C): F=90+T+50=90+70+50=210 N

$In the given figure the blocks A, B and C weigh 4 kg, 6 kg and 8 kg respectively. The co-efficient of sliding friction between any two surfaces is 0.5. The force F required to slide the block C with constant speed is____N. (Use g = 10 m / s^{2})$

Solution

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