A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to
  • a)
    25
  • b)
    50
  • c)
    100
  • d)
    250
Correct answer is option 'B'. Can you explain this answer?

SSC Question

Knowledge Hub
May 31, 2021
Intial angular velocity , ω₀ = 0 [because flywheel moves from rest ]
final angular velocity, ω = 1000 rpm = 1000/60 rev/sec
Time taken , t = 6 sec
We know, the formula,
ω = ω₀ + αt
Where α is angular acceleration.
1000/60 = 0 + α6
α = 1000/360 = 100/36 = 25/9 rev/s²
Now, use formula
θ = ω₀t + 1/2αt²
= 0 + 1/2 × 25/9 × (6)²
= 1/2 × 25/9 × 36
= 1/2 × 25 × 4
= 50 rev
Hence , number of revolution =50

This discussion on A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal toa)25b)50c)100d)250Correct answer is option 'B'. Can you explain this answer? is done on EduRev Study Group by SSC Students. The Questions and Answers of A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal toa)25b)50c)100d)250Correct answer is option 'B'. Can you explain this answer? are solved by group of students and teacher of SSC, which is also the largest student community of SSC. If the answer is not available please wait for a while and a community member will probably answer this soon. You can study other questions, MCQs, videos and tests for SSC on EduRev and even discuss your questions like A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal toa)25b)50c)100d)250Correct answer is option 'B'. Can you explain this answer? over here on EduRev! Apart from being the largest SSC community, EduRev has the largest solved Question bank for SSC.

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This discussion on A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal toa)25b)50c)100d)250Correct answer is option 'B'. Can you explain this answer? is done on EduRev Study Group by SSC Students. The Questions and Answers of A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal toa)25b)50c)100d)250Correct answer is option 'B'. Can you explain this answer? are solved by group of students and teacher of SSC, which is also the largest student community of SSC. If the answer is not available please wait for a while and a community member will probably answer this soon. You can study other questions, MCQs, videos and tests for SSC on EduRev and even discuss your questions like A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal toa)25b)50c)100d)250Correct answer is option 'B'. Can you explain this answer? over here on EduRev! Apart from being the largest SSC community, EduRev has the largest solved Question bank for SSC.