A trolley of mass 300 ; kg carrying a sandbag | vedclass

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(D) The trolley and the sandbag constitute a system moving on a frictionless track. Since there is no external horizontal force acting on the system,t

Vedclass · Accepted Answer

$27$

Vedclass · Answer

(D) The trolley and the sandbag constitute a system moving on a frictionless track. Since there is no external horizontal force acting on the system,the net external force is zero. According to Newton's first law of motion,an object in motion will continue to move with the same velocity unless acted upon by an external force. The leaking of sand is an internal process within the system and does not exert any external force on the trolley. Therefore,the velocity of the trolley remains constant throughout the process. Thus,the speed of the trolley after the sandbag is empty remains $27 \; km/h$.

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