Posted by Bob on .
. A rock is thrown up into the air with an initial velocity of 15m/s up. What is the rock's velocity after 0.40 seconds?

Physics 
bobpursley,
vf=vi*t4.9t^2
Posted by Bob on .
. A rock is thrown up into the air with an initial velocity of 15m/s up. What is the rock's velocity after 0.40 seconds?
vf=vi*t4.9t^2