An archer shoots an arrow into a piece of wood. The arrow is traveling at 120 km/h when it strikes the wood. The arrow penetrates 3.8 cm into the wood before stopping. What is its average acceleration (in m/s2) into the wood?
Physics - bobpursley, Monday, March 19, 2012 at 5:45pm
vf^2=vi^2+2ad solve for a. vi needs to be in m/s, d in meters.