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Three blocks A, B and C are kept as shown in figure. The coefficient of friction between A and B is 0.2, B and C is 0.1, C and ground is 0.0. The mass of A, B and C are 3 kg, 2 kg and 1 kg respectively. A is given a horizontal velocity 10 m/s. A, B and C always remain in contact i.e. lies as in figure. The total work done by friction will be
  • a)
    – 75 J
  • b)
    75 J
  • c)
    – 150 J
  • d)
    – 100 J
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Three blocks A, B and C are kept as shown in figure. The coefficient o...
The block A is given 10m/s velocity
Initial momentum of the system = 3 x 10 = 30
As no external force is applied the linear momentum of the system: 30=6xv
v=5 m/s
The final mass will be taken 6 kg as it is given that finally, all the blocks are moving together as a system.
By the conversation of energy
(1/2) x 3 x 10+ frictional work done = (1/2) x 6 x 52
⇒ Frictional work done = -75J
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Most Upvoted Answer
Three blocks A, B and C are kept as shown in figure. The coefficient o...
The block A is given 10m/s velocity
Initial momentum of the system = 3 x 10 = 30
As no external force is applied the linear momentum of the system: 30=6xv
v=5 m/s
The final mass will be taken 6 kg as it is given that finally, all the blocks are moving together as a system.
By the conversation of energy
(1/2) x 3 x 10+ frictional work done = (1/2) x 6 x 52
⇒ Frictional work done = -75J
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Three blocks A, B and C are kept as shown in figure. The coefficient o...
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Three blocks A, B and C are kept as shown in figure. The coefficient of friction between A and B is 0.2, B and C is 0.1, C and ground is 0.0. The mass of A, B and C are 3 kg, 2 kg and 1 kg respectively. A is given a horizontal velocity 10 m/s. A, B and C always remain in contact i.e. lies as in figure. The total work done by friction will bea)– 75 Jb)75 Jc)– 150 Jd)– 100 JCorrect answer is option 'A'. Can you explain this answer? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Three blocks A, B and C are kept as shown in figure. The coefficient of friction between A and B is 0.2, B and C is 0.1, C and ground is 0.0. The mass of A, B and C are 3 kg, 2 kg and 1 kg respectively. A is given a horizontal velocity 10 m/s. A, B and C always remain in contact i.e. lies as in figure. The total work done by friction will bea)– 75 Jb)75 Jc)– 150 Jd)– 100 JCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Three blocks A, B and C are kept as shown in figure. The coefficient of friction between A and B is 0.2, B and C is 0.1, C and ground is 0.0. The mass of A, B and C are 3 kg, 2 kg and 1 kg respectively. A is given a horizontal velocity 10 m/s. A, B and C always remain in contact i.e. lies as in figure. The total work done by friction will bea)– 75 Jb)75 Jc)– 150 Jd)– 100 JCorrect answer is option 'A'. Can you explain this answer?.
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