kinematics

• What Is the Area Under a Displacement–Time Graph?
  For a displacement–time graph, integrate displacement over time: the result has units of distance × time, not displacement. Learn how to calculate it.
• How to Calculate Average Acceleration Without Time
  Find acceleration without time from initial and final velocities and displacement when acceleration is constant; otherwise, more information is needed.
• How to Calculate the Acceleration of a Moving Elevator
  Calculate elevator acceleration from its change in velocity or from the net force, and determine whether it accelerates upward or downward.