Question

A fire hose held near the ground shoots water at a speed of 5.5 .At what angle(s) should the nozzle point in order that the water land 2.0 away (see the figure )?

Answer 1

Dx = Vo^2*sin(2A)/g = 2
(5.5)^2*sin(2A)/9.8 = 2,
30.25*sin(2A)/9.8 = 2,
Multiply both sides by 9.8:
30.25*sin(2A) = 19.6,
sin(2A) = 19.6 / 30.25 = 0.64793,
2A = 40.4 Deg.
A = 20.2 Deg.

Answer 2

Mastering physics will take this answer: --> 26,64 <-- degrees.