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A block of mass 2kg is hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant force F = 40N. The kinetic energy of the particle increase 40J in a given interval of time. Then : (g = 10m/s2)
  • a)
    tension in the string is 40N 
  • b)
    displacement of the block in the given interval of time is 2m 
  • c)
    work done by gravity is –20J 
  • d)
    work done by tension is 80J
Correct answer is option 'A,B,D'. Can you explain this answer?
Verified Answer
A block of mass 2kgis hanging over a smooth and light pulley through a...
Free body diagram of block is as shown in figure.
From work-energy theorem
Work done by gravity is 
and work done by tension is
The correct answers are: tension in the string is 40N, displacement of the block in the given interval of time is 2m, work done by tension is 80J
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Most Upvoted Answer
A block of mass 2kgis hanging over a smooth and light pulley through a...
Free body diagram of block is as shown in figure.
From work-energy theorem
Work done by gravity is 
and work done by tension is
The correct answers are: tension in the string is 40N, displacement of the block in the given interval of time is 2m, work done by tension is 80J
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A block of mass 2kgis hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant forceF= 40N. The kinetic energy of the particle increase 40Jin a given interval of time. Then : (g= 10m/s2)a)tension in the string is 40Nb)displacement of the block in the given interval of time is 2mc)work done by gravity is –20Jd)work done by tension is 80JCorrect answer is option 'A,B,D'. Can you explain this answer?
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A block of mass 2kgis hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant forceF= 40N. The kinetic energy of the particle increase 40Jin a given interval of time. Then : (g= 10m/s2)a)tension in the string is 40Nb)displacement of the block in the given interval of time is 2mc)work done by gravity is –20Jd)work done by tension is 80JCorrect answer is option 'A,B,D'. Can you explain this answer? for Physics 2024 is part of Physics preparation. The Question and answers have been prepared according to the Physics exam syllabus. Information about A block of mass 2kgis hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant forceF= 40N. The kinetic energy of the particle increase 40Jin a given interval of time. Then : (g= 10m/s2)a)tension in the string is 40Nb)displacement of the block in the given interval of time is 2mc)work done by gravity is –20Jd)work done by tension is 80JCorrect answer is option 'A,B,D'. Can you explain this answer? covers all topics & solutions for Physics 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A block of mass 2kgis hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant forceF= 40N. The kinetic energy of the particle increase 40Jin a given interval of time. Then : (g= 10m/s2)a)tension in the string is 40Nb)displacement of the block in the given interval of time is 2mc)work done by gravity is –20Jd)work done by tension is 80JCorrect answer is option 'A,B,D'. Can you explain this answer?.
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