vertikal speed=20*sine(40 deg)=20*0.363970234
=7.279 meter/sek
hite=how hi yu drop sumthun & it hit at this speed
assume gravity=konst, (enerjee/mass)=g*hite
(enerjee/mass)=(1/2)speed*speed
thus, hite=(1/2)speed*speed/g
=(1/2)(7.279*7.279)/9.81
hite=2.700 meters