× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Science-Related Homework Help Physics
New Topic  
lavashooter3 lavashooter3
wrote...
Posts: 7
Rep: 0 0
6 years ago
A soccer player kicks the ball toward a goal that is 28.0 m in front of him. The ball leaves his foot at a speed of 19.1 m/s and an angle of 33.2° above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The answer is not 19.1 m/s.)
Read 156 times
1 Reply

Related Topics

Replies
wrote...
#1
Educator
6 years ago
Hi there

horizontal component of velocity Vx= Vcos(tehta) = 19.1*cos33.2 = 15.98 m/s 17.616 m/s

vertical component of vwelocity = Vy = Vsin(tehta) = 19.1*sin33.2 = 10.45 m/s

time of flight

t = D/Vx = 28/15.98 = 1.752 s

The final y velocity is

Vyf = Vy + g*t

Vfy = 10.45 - 9.8*1.752 = -6.71 m/s

V = sqrt(Vx^2+Vyf^2)

V = sqrt(15.98^2+ (-6.71)^2)

V = 17.33 m/s

NOTE: I did not consider significant digits. I hope this helps Slight Smile
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1129 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 318
  
 29
  
 353
Your Opinion
Which is the best fuel for late night cramming?
Votes: 145
Previous poll results: What's your favorite funny biology word?