Questions in Laws of Motion

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A gardner waters the plants by a pipe of diameter 1mm. The water comes out at the rate or $10 cm^3/sec$. The reactionary force exerted on the hand of the gardner is
A solid disc of mass M is just held in air horizontally by throwing 40 stones per sec vertically upwards to strike the disc each with a velocity 6 $m{s^{ - 1}}$. If the mass of each stone is $0.05kg$ what is the mass of the disc$(g = 10m{s^{ - 2}}$)
A ladder rests against a frictionless vertical wall, with its upper end 6m above the ground and the lower end 4m away from the wall. The weight of the ladder is 500 N and its C. G. at 1/3rd distance from the lower end. Wall's reaction will be, (in Newton)
A satellite in force-free space sweeps stationary interplanetary dust at a rate $dM/dt = \alpha v$ where M is the mass, v is the velocity of the satellite and $\alpha $ is a constant. What is the deacceleration of the satellite
10,000 small balls, each weighing 1 gm, strike one square cm of area per second with a velocity 100 m/s in a normal direction and rebound with the same velocity. The value of pressure on the surface will be
Swimming is possible on account of
When we jump out of a boat standing in water it moves
You are on a frictionless horizontal plane. How can you get off if no horizontal force is exerted by pushing against the surface
On a stationary sail-boat, air is blown at the sails from a fan attached to the boat. The boat will
A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton's

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