Two boys of masses 10 kg and 8 kg are moving along a vertical rope, the former climbing up with acc. 2 m/s² while later coming down with the uniform velocity of 2 m/s. The tension in rope at fixed support will be (g=10 m/s²)???

Explain pls.

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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