A) 5 m
B) 4.8 m
C) 3.2 m
D) 3.0 m
Correct Answer: C
Solution :
If the man, starts walking on the trolley in the forward direction, then whole system will move in backward direction with the same momentum. Momentum of man in forward direction = Momentum of system (man + trolley) in backward direction \[\Rightarrow \]\[80\times 1=(80+320)\times v\Rightarrow v=0.2\,m/s\] So the velocity of man w.r.t. ground 1.0-0.2=0.8 m/s \[\therefore \]Displacement of man w.r.t. ground\[~=0.8\times 4\] = 3.2 mYou need to login to perform this action.
You will be redirected in
3 sec