A) \[{{W}_{ext}}=\Delta U\](always)
B) \[{{W}_{\text{conservative}}}=-\Delta U\](always)
C) \[{{W}_{ext}}=\Delta U+\Delta KE\] (always)
D) \[{{W}_{\operatorname{co}nservative}}=-\Delta KE\]
Correct Answer: B
Solution :
| [b] If only conservative forces are acting in the system. |
| \[\Rightarrow \] \[{{W}_{ext}}=\Delta U\] (If body moves without acceleration) |
| \[{{W}_{ext}}=\Delta U+\Delta KE\] |
| (if body moves with acceleration) |
| \[\Rightarrow \] \[{{W}_{\text{conservative}}}=-\Delta U\] (always) |
You need to login to perform this action.
You will be redirected in
3 sec
