One strategy in a snowball fight is to throw a snowball at a high angle over level ground. while your opponent is watching the first one, a second snowball is thrown 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 20.0 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 to arrive at the same time?

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.