A balloon is descending through still air at a constant speed of 1.88 m/s. The total weight of the balloon, including payload, is 10.8 kN. A constant upward buoyant force of 10.3 kN is exerted on the balloon. The air also exerts a drag force given by D = bv², where V is the speed of the balloon and b is a constant. The crew drops 26.5 kg of ballast. What will be the eventual constant downward speed of the balloon?

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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