Write true or false for each statement
(a) Two trains going in opposite directions with the same speed are at rest relative to each other.
(b) A ball is thrown vertically upwards. Its motion is uniform throughout.
(c) The motion of a train starting from one station and reaching at another station is non-uniform.
(d) A motion which repeats itself after a fixed interval of time is called periodic motion.
(e) A ball thrown by a boy from a roof-top has oscillatory motion.
(f) Mass has both magnitude and direction.
(g) .Weight always acts vertically downwards.
(h) Mass varies from place to place but weight does not.
