Hi Momo.
You are probably expected to ignore air friction and just use the acceleration due to gravity to solve this problem.
Gravitational acceleration is a constant for your situation - you should know the value of gravitational acceleration from your textbook.
A) The formula for displacement for an object under constant linear acceleration is
**x = v**_{0}t + ½at^{2}
where **x** is the displacement from the position at time **t** = 0, **v**_{0 } is the initial velocity and **a** is the constant acceleration (gravitational acceleration). Use this formula to find the answer.
B) The formula for velocity under constant acceleration given the displacement **x** is
**v**^{2} = v_{0}^{2} + 2ax
Use this formula for part B.
Hope this helps,
Stephen La Rocque. |