Explain the following:
(a) When a train suddenly moves
forward, the passenger standing in the compartment tends to fall backwards
(b) When a corridor train suddenly
starts, the sliding doors of some compartments may open.
(c) People often shake branches of
a tree for getting down its fruits.
(d) After alighting from a moving bus, one has to run for
some distance in the direction of bus in order to avoid falling.
(e) Dust particles are removed
from a carpet by beating it.
(f) It is advantageous to run
before taking a long jump.