A block of mass M is kept on a platform which is accelerated upward with a constant acceleration 'a' during the time interval T. The work done by normal reaction between the block and platform is
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a
−MgaT22
b
12M(g+a)aT2
c
12Ma2T
d
Zero
answer is B.
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Detailed Solution
Work done by normal reaction=Nh=M(g+a)12aT2=12M(g+a)aT2
A block of mass M is kept on a platform which is accelerated upward with a constant acceleration 'a' during the time interval T. The work done by normal reaction between the block and platform is