question_answer

   (i) Name the property of bodies to resist a change in their velocity. (ii) What is the relationship between force and acceleration ? (iii) What name is given to the product of mass and velocity of a body? (iv) Which physical quantity corresponds to the rate of change of momentum? (v) Name the principle on which a rocket works.   

Answer:

                  (i) The property of bodies to resist a change in their velocity is inertia.                                    (1) (ii) The relation between force and accelerations is F = m x a                              (1) (iii) The product of mass and velocity of body is momentum.                                                       (1) (iv) The physical quantity that corresponds to the rate of change of momentum is force. (1)    (v) The principle on which a rocket works is Newton's third law of motion.                               (1)