Question
A mortar elevated to 60 degrees scores a hit 15 m up a building 30m away. with what speed was the shell fired?
Answers
bobpursley
You have two equations, vertical and horizontal..
horizontal
30=Vcos60 * time solve for time in terms of V.
Verical.
15=Vsin60*time-4.9 time^2
put the expression for time you got above, and then solve for V. It is a quadratic, and there is some messy algebra.
horizontal
30=Vcos60 * time solve for time in terms of V.
Verical.
15=Vsin60*time-4.9 time^2
put the expression for time you got above, and then solve for V. It is a quadratic, and there is some messy algebra.