You take a frisbee to the top of the Washington Monument and send it sailing along horizontally at a speed of 5 m/s from the very top of the structure, which is

Question

You take a frisbee to the top of the Washington Monument and send it sailing along horizontally at a speed of 5 m/s from the very top of the structure, which is 169.2 m above the ground.

A) How long will the frisbee remain in the air? (Remember--perfect physics world--no air resistance!)



B) How far down range will the frisbee go (down range - horizontal distance.)?

Answer 1

(A)

 

Set the initial height equal to gt²/2 and solve for t.

 

h₀ = gt²/2

 

t = √(2h₀/g)

 

h₀ = 169.2 m

g = 9.8 m/s²

 

Plug in the numbers and get t in seconds.

 

(B)

 

x = v_xt

 

v_x = 5 m/s

t = result from part (A) in seconds

 

Plug in the numbers and get x in meters.