Question
You fire a cannon ball from ground level at a speed of 20.0 m/s ∠30.0
Find the time taken for the ball to hit the earth. How far will it land?
Find the time taken for the ball to hit the earth. How far will it land?
Answers
Henry
Vo = 20m/s[30o]
Xo = 20*Cos30 = 17.3 m/s.
Yo = 20*sin30 = 10 m/s.
Y = Yo + g*Tr
Y = 0
Yo = 10 m/s.
g = -9.8 m/s^2
Solve for Tr(Rise time).
Tf = Tr = Fall time.
Dx = Xo * (Tr+Tf)
Xo = 20*Cos30 = 17.3 m/s.
Yo = 20*sin30 = 10 m/s.
Y = Yo + g*Tr
Y = 0
Yo = 10 m/s.
g = -9.8 m/s^2
Solve for Tr(Rise time).
Tf = Tr = Fall time.
Dx = Xo * (Tr+Tf)