Questions in Work, Energy and Power

Select	Question
	If momentum is increased by 20%, then K.E. increases by
	The kinetic energy of a body of mass 2 kg and momentum of 2 Ns is
	The decrease in the potential energy of a ball of mass 20 kg which falls from a height of 50 cm is
	An object of 1 kg mass has a momentum of 10 kg m/sec then the kinetic energy of the object will be
	A ball is released from certain height. It loses 50% of its kinetic energy on striking the ground. It will attain a height again equal to
	A 0.5 kg ball is thrown up with an initial speed 14 m/s and reaches a maximum height of 8.0m. How much energy is dissipated by air drag acting on the ball during the ascent
	An ice cream has a marked value of 700 kcal. How many kilowatt- hour of energy will it deliver to the body as it is digested
	What is the velocity of the bob of a simple pendulum at its mean position, if it is able to rise to vertical height of $10cm$ (Take $g = 9.8\,m/{s^2})$
	A particle of mass 'm' and charge 'q' is accelerated through a potential difference of 'V' volt. Its energy is
	A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by 1m/s so as to have same K.E. as that of the boy. The original speed of the man will be