One strategy in a snowball fight is to throw a snowball at a high angle over level ground.
While your opponent is watching this first
snowball, you throw a second snowball at a
low angle and time it to arrive at the same
time as the first.
Assume both snowballs are thrown with
the same initial speed 15 m/s. The first snowball is thrown at an angle of 69◦
above the
horizontal.
A). At what angle should you throw
the second snowball to make it hit the same
point as the first? Note the starting and ending heights are the same. The acceleration of
gravity is 9.8 m/s^2.
B). How many seconds after the first snowball
should you throw the second so that they
arrive on target at the same time?
Answer in units of s.