A landing craft approaches the surface of Callisto, one off the satellites (moons) of the plant Jupiter (Fig. 3-31). If an upward thrust of 3260 N is supplied by the rocket engine, the craft descends with constant speed. Callisto has no atmosphere. If the upward thrust is 2200 N, the craft accelerates downward at 0.390 m/s. (a) What is the weight of the landing craft in the vicinity of Callisto’s surface? (b) What is the mass of the craft? (c) What is the acceleration due to gravity near the surface of Callisto?

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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