Three charged balls A B C are thrown at the same time from the top of a very high building with velocities mentioned.
v_A=3j-3i
v_B=3j
v_C=6j+2i
All the balls are of same mass.Horizontal is X direction and vertically up is Y direction.
Find the max height attained by the centr of mass of the balls. ANS:0.8m
The min speed of COM will be? ANS:0.33 m/s

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.

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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