An archer shoots an arrow horizontally with an initial velocity of 100 meters per second from a building that is 20 meters high. (air resistance is neglected)

Question

a. Calculate the time when the arrow is in the air.
b. Find the horizontal distance the arrow travels before striking the level ground.

Answer 1

a. d = Vo*t + 0.5g*t^2 = 20 m.
0 + 4.9t^2 = 20,
t^2 = 4.08,
t = Tf = 2.02 s. = Fall time = Time in
flight.

b. Dx=Xo * Tf=100 m/s * 2.o2 s.=202 m.