Problem Solver Fundamental of Physics Halliday and Resnick Chapter 4 Number 41

 

Solver Problem Chapter 4 Number 41

Upon spotting an insect on a twig overhanging water, an archer fish squirts water drops at the insect to knock it into the water (Fig. 4-38). Although the fish sees the insect along a straight-line path at angle  and distance d, a drop must be launched at a different angle  if its parabolic path is to intersect the insect. If  =36.0° and d = 0.900 m, what launch angle is required for the drop to be at the top of the parabolic path when it reaches the insect?