Questions in Laws of Motion

Select	Question
	A machine gun fires 20 bullets per second into a target. Each bullet weighs 150 gms and has a speed of 800 m/sec. Find the force necessary to hold the gun in position
	The tension in the spring is
	A book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book
	When a horse pulls a wagon, the force that causes the horse to move forward is the force
	A student attempts to pull himself up by tugging on his hair. He will not succeed
	A man is standing at the centre of frictionless pond of ice. How can he get himself to the shore
	A jet plane flies in the air because
	A player caught a cricket ball of mass 150 gm moving at a rate of 20 m/s. If the catching process be completed in 0.1 s, then the force of the blow exerted by the ball on the hands of the player is
	A rocket has a mass of 100 kg. 90% of this is fuel. It ejects fuel vapours at the rate of 1 kg/sec with a velocity of 500 m/sec relative to the rocket. It is supposed that the rocket is outside the gravitational field. The initial upthrust on the rocket when it just starts moving upwards is
	In which of the following cases forces may not be required to keep the