A) \[{{\vec{v}}_{A}}\,+\,{{\vec{v}}_{B}}=0\]
B) \[{{m}_{A\,}}{{\vec{v}}_{A}}+\,{{m}_{B}}{{\vec{v}}_{B}}=0\]
C) \[{{W}_{A}}\,+\,{{W}_{B}}=0\]
D) \[{{\vec{a}}_{A}}+{{\vec{a}}_{B}}=0\]
Correct Answer: B
Solution :
[b] Since \[\Sigma {{\vec{F}}_{ext}}=\vec{0}\Rightarrow {{m}_{A}}{{\vec{a}}_{A}}+{{m}_{B}}{{\vec{a}}_{B}}=0\] \[\therefore \]Momentum of system will remain conserved, equal to zero. \[{{m}_{A}}{{\vec{v}}_{A}}+{{m}_{B}}{{\vec{v}}_{B}}=0\] But \[{{W}_{A}}+{{W}_{B}}\ne 0\]You need to login to perform this action.
You will be redirected in
3 sec