An object falls freely from height h. It is released at time zero and strikes the ground at time t.
(a) When the object is at height 0.5h, is the time earlier than 0.5t, equal to 0.5t, or later than 0.5t?
(b) When the time is 0.5t, is the height of the object greater than 0.5h, equal to 0.5h, or less than 0.5h? Give reasons for your answers.