R

Rakesh Kumar • 28.44K Points
Instructor II 

Q. The statement that the sum of the kinetic and potential energies of a particle in the earth's gravitational field is constant is known as

(A) Principle of conservation of mechanical energy
(B) Taking off of an aircraft
(C) Lifting of a balloon
(D) Throwing of a cricket ball by a player
Correct : Option (D)

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