question_answer11) Mountain roads rarely go straight up but wind up gradually. Why?
question_answer12) What sort of energy is associated with a bird flying in air?
question_answer13) When an arrow is shot, where from the arrow will acquire its kinetic energy?
question_answer14) Can a body have energy without momentum?
question_answer15) Can a body have momentum without energy?
question_answer18) How does the kinetic energy of a body change if its momentum is doubled?
question_answer21) Can there be a situation in which\[E-U<0\]?
question_answer22) Can the overall energy of a body be negative?
question_answer31) What are central forces? Are they conservative in nature?
question_answer32) When is the exchange of energy maximum during an elastic collision?
question_answer33) Is whole of the kinetic energy lost in any perfectly inelastic collision?
question_answer34) Can you associate potential energy with a non-conservative force?
question_answer36) A spark is produced, when two stones are struck against each other. Why?
question_answer51) Why a metal ball rebounds better than a rubber ball?
question_answer52) Explain, throwing mud on a wall is an example of perfectly inelastic collision.
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