A man of mass m is standing on a stationary flat trolly of mass M. The trolly can move without friction on the horizontal rails. The man starts walking with speed v relative to trolley, then work done hy him (the trolly can move only along the rails) -
A
is greater than 
mv 2 if he walks along rails
mv 2 if he walks along rails
B
is less than 
mv 2 if he walks along rails
mv 2 if he walks along rails
C
is equal to 
mv 2 if he walks normal to rails None of above
mv 2 if he walks normal to rails None of above
Text Solution
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(b, c)
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