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A block of mass m is attached with a spring of force constant K. Now the other end of the spring is pulled with constant speed u. What is the maximum K.E of the block?(μ=0)

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a

12mu2

b

mu2

c

2mu2

d

32mu2

answer is C.

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Detailed Solution

Maximum velocity of block wrt earth =2uMaximum KE = 12m2u2=2mu2

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A block of mass m is attached with a spring of force constant K. Now the other end of the spring is pulled with constant speed u. What is the maximum K.E of the block?(μ=0)