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Block A weighing 200 kg resting on the rough floor supports block B weighing 100 kg as shown in the figure. Both the blocks are connected with a rope passing over a smooth pulley. Find the force P required to impending motion. (Take g = 9.81 m/s2 and coefficient of friction = 0.3)
  • a)
    1471.5 N
  • b)
    150 N
  • c)
    147.1 N
  • d)
    14715 N
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Block A weighing 200 kg resting on the rough floor supports block B w...
Considering FBD of block B,
S = μNB = 0.3 × 100 = 30kg
Considering FBD of block A,
NA=NB + 200 = 100 + 200 = 300kg
μμP = μNA + μNB + S = 0.3 × 300 + 0.3 × 100 + 30 = 150kg
Required force P =150kgwt = 150 × 9.81 = 1471.5N
P = 1471.5N
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Block A weighing 200 kg resting on the rough floor supports block B weighing 100 kg as shown in the figure. Both the blocks are connected with a rope passing over a smooth pulley. Find the force P required to impending motion. (Take g = 9.81 m/s2 and coefficient of friction = 0.3)a)1471.5 Nb)150 Nc)147.1 Nd)14715 NCorrect answer is option 'A'. Can you explain this answer?
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