A) may move but not accelerate
B) may accelerate
C) must not move
D) None of the above
Correct Answer: A
Solution :
According to the equation of motion of the centre of mass \[M\,{{\vec{a}}_{CM}}={{\vec{F}}_{ext}}\] If \[{{\vec{F}}_{ext}}=0,\,{{\vec{a}}_{CM}}=0\] \[\therefore \] \[{{\vec{v}}_{CM}}=\] constant ie, if no external force acts on a system the velocity of its centre of mass remains constant. Thus, the centre of mass may move but not accelerate.You need to login to perform this action.
You will be redirected in
3 sec