(i) from ground frame is 320 J |
(ii) is equal to work done by friction force in elevator frame |
(iii) is equal to work done by friction in ground frame of the three statements given above, the one that is true is given by the choice |
A) Only (i)
B) (ii) and (iii)
C) (i) and (ii)
D) only (iii)
Correct Answer: A
Solution :
[a] W.D. from ground frame \[=6.4\times 50= 320 \,J\] From elevator frame, displacement = 0. \[\operatorname{N} cos 37{}^\circ = 8\times 0.8 = 6.4 N\]You need to login to perform this action.
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