Choose up as the positive direction.
(a) Make a graph of velocity as a function of time.
You step into an elevator. It is at rest for 1 sec, then it starts
to move upwards, accelerating to a constant speed in the next 1 sec. It moves
at the constant speed for 1 sec, then slows uniformly to a stop in 1 sec. It
stays at rest for 1 sec, then begins to move downwards reaching a constant speed
in 1 sec. It moves down at this constant speed for 1 sec, then slows to a stop
in the next sec.
Choose up as the positive direction.
(a) Make a graph of velocity as a function of time.
(b) Make a graph of acceleration as a function of time.
(c) Draw a free body diagram for the elevator (it has a mass m).
(d) Make a graph of cable tension as a function of time.
This page maintained by Anne G. Young. Last modified 15-Sep-2004 .