Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
Before a rubber ball bounces off from the floor, the ball is in
contact with the floor for a fraction of second. Which of the
following statements is correct?
(a) Conservation of energy is not valid during this period
(b) Conservation of energy is valid during this period
(c) As ball is compressed, kinetic energy is converted to
compressed potential energy
(d) None of these
Answer:
. (b) The law of conservation of energy is valid at any instant
& in all circumstances
