Draw the velocity time graph a train moving on a straight path along a particular direction with a constant velocity? can somebody draw and showplzz

The functioning of an electron transport chain is analogous to a) a slinky toy going down a flight of stairs. b) a canoe going over a waterfall. c) a person climbing a flight of stairs one step at a time. d) a person leaping from the top to the bottom of a flight of stairs in one jump.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories