v+((u/length ofthe trolley)+1)
mass of trolley=M,mass of child=m
answer=(Mv-mu)/(M+m)
the child runs opposite to the direction of trolley or at the same direction ?
i
the centre of mass will be going with speed v as no external effect or force is acting on the system and momentum will remain conserved. initial speed of trolley = v and hence final speed will be = v.
the friction due to the foot of the child act in equal and opposite pairs on the system and hence no effect is produced in the momentum. we are considering trolley and child together as a system.
Three identical balls are placed on a frictionless
horizontal surface touching each other. They stick to
each other because of adhesive. Another ball of same
radius and mass m is placed over the void created by
the three balls. Find the forces applied by the balls
kept on the floor to each other if the system remains
in equilibrium.
Last Activity: 10 Months ago
A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.
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Last Activity: 10 Months ago
Last Activity: 3 Years ago
Last Activity: 3 Years ago
