A pendulum is hanging in a moving car making an angle θ with the verticle, the car is moving with a constant acceleration. The linear momentum of the pendulum is incresing as seen from outside. Is this against coservation of linear momentum. Where is the external force coming from...???

And plz explain me what happens to the linear momentum in a non-inertial frame...???

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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