Posted by Leonel on .
A stone is thrown down a well at a velocity of 20m/s. If the well is 20m deep, calculate the time taken for the stone to reach the bottom of the well.

Engineering science 
bobpursley,
depth= vi*t4.9t^2 where vi=20, d=20
solve for t. 
Engineering science 
Anonymous,
V=u+at 20=0+9.8t