One strategy in a snowball fight is to throw a snowball at a highangle over leve
ID: 1736261 • Letter: O
Question
One strategy in a snowball fight is to throw a snowball at a highangle over level ground. While your opponent is watching thatsnowball, you throw a second one at a low angle timed to arrivebefore or at the same time as the first one. Assume that bothsnowballs are thrown with a speed of 35.0 m/s. The first one is thrown at an angle of75.0°with respect to the horizontal. (a) At what angle should the second snowball bethrown to arrive at the same point as the first?1°
(b) How many seconds later should the second snowball be thrownafter the first in order for both to arrive at the same time?
2 s (a) At what angle should the second snowball bethrown to arrive at the same point as the first?
1°
(b) How many seconds later should the second snowball be thrownafter the first in order for both to arrive at the same time?
2 s
Explanation / Answer
part a) we know that in the case of a projectile for the same range we canhave two angles of projection and 90- first angle is 750 so second snow ball should be thrown at an angle of90-75=150 time of flight for the firstball -time of flight for the second ball= 2usin75/g- 2usin15/g=2u[sin75-sin15]/g=2*35*0.7071/9.8=5.050sec How many seconds later should the second snowball be thrown afterthe first in order for both to arrive at the same time? 2 s 5.050sec
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