× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
w
5
a
3
j
2
a
2
t
2
u
2
r
2
j
2
j
2
l
2
d
2
y
2
Home Q & A Board Biology-Related Homework Help Biochemistry
New Topic  
ilikepie1234 ilikepie1234
wrote...
11 years ago
In a circus act, a 66 kg clown is shot from a cannon with an initial velocity of 16 m/s at some unknown angle above the horizontal. A short time later the clown lands in a net that is 4.2 m vertically above the clown's initial position. Disregard air drag. What is the kinetic energy of the clown as he lands in the net?
Read 538 times
1 Reply

Related Topics

Replies
iliya1 Author
wrote...
#1
11 years ago
Since air drag is disregarded, we can use conservation of energy.

Initial kinetic energy of clown = ½*66*16² = 8448 J.
Increase in gravitational potential energy of clown = 66*9.8*4.2 = 2716.56 J, assuming acceleration due to gravity = 9.8 m/s².

By conservation of energy, the increase in potential energy of the clown equals his decrease in kinetic energy.

Hence the kinetic energy of clown as he lands in the net = 8448 - 2716.56 = 5700 J, to 2 significant figures.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1272 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 311
  
 306
  
 282
Your Opinion
Where do you get your textbooks?
Votes: 447
Previous poll results: Who will win the 2024 president election?