Posted by Mykmoloko on Wednesday, February 9, 2011 at 10:14am.
Suppose that you hold a garden hose on the ground. It spurts water at a speed of 6,0m.s' (a) at what angle (to the horizontal) should you hold the hose pipe if you want to water plants 2m away? (b) explain why there are two possible angles?.

science  drwls, Wednesday, February 9, 2011 at 12:10pm
(V^2/g)*sin2A = 2.0 m
is the equation for where the water lands.
It is the same equation that applies to ballistics (cannonballs, thrown rocks etc)
Solve for the angle A. There will be two of them, since 2A can range from 0 to 180 degrees.
A = 16.5 and 73.5 degrees
Note that they are complementary angles.