Question

Chinook salmon are able to move upstream faster by jumping out of the water periodically; this behavior is called porpoising. Suppose a salmon swimming in still water jumps out of the water with a speed of 6.26 m/s at an angle of 40°, sails through the air a distance L before returning to the water, and then swims a distance L under water at a speed of 3.54 m/s before beginning another porpoising maneuver. Determine the average speed of the fish. m/s

16. One strategy in a snowball fight is to throw a snowball at a high angle over level ground. Then, while your opponent is watching that snowball, you throw a second one at a low angle timed to arrive before or at the same time as the first one. Assume both snowballs are thrown with a speed of 21.0 m/s. The first one is thrown at an angle of 75.0° with respect to the horizontal. (a) At what angle should the second snowball be thrown to arrive at the same point as the first? ° (b) How many seconds later should the second snowball be thrown after the first in order for both to arrive at the same time? s

Answer 1