Doubt in work power energy

1 Like

A-PS
B-PS
C-R
D-PS
Is it correct?

Sorry for A -QS

Actually i dont know the answer.... please give the explanation as well @Achyut_2020

A - as we know total workdone by normal in system is zero , so on the block it will be negative as for wedge it is positive
B- draw FBD you wiil see
C- same reason as A
D- as you can see initial it was at rest and at final there will be some velocity so KE will be positive so total work done will be positive

1 Like