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Manu Vatika Sr. Sec. School (Budhlada), , Class -9" (physics) ASSIGNMENT, , Chapter- work and energy, , , , , , 1.A student picks up four books from the floor,, walks across the room through some distance, with the books at the same height and then, keeps these books at the new place. In which, of these sequence of actions work is said to be, performed ?, , 2.Out of a light and a heavy body having equal, kinetic energy, which one will is move fast?, , 3.Give one example each of potential energy, (i) due to position, (ii) due to shape., , 4.A rocket is moving up with a velocity v. If the, velocity of this rocket is suddenly tripled, what, will be the ratio of two kinetic energies?, , 5.A light and a heavy object have the same, momentum, find out the ratio of their kinetic, energies.