Calculating velocity or acceleration

  • Thread starter newton2008
  • Start date
  • #1
for our physics project we had to build a catapult
and our group built a kind of ballista.. if u dont know what that is it's a type of catapult that shoots out the object instead of launching it like a see-saw
so our catapult is hooked up to a spring which you pull back.. then release it to launch a marble through a pipe
but we need to find the velocity of our marble when it's launched
how am i supposed to do that?

i'm thinking i could use the spring constant somehow.. but i dont have any ideas on how to apply it

any help appreciated guys :)
 

Answers and Replies

  • #2
55
0
Potential energy from a spring is calculated by the formula U=(1/2)kx^2, where k is the spring constant, and x is the change in the length of the spring.

Plug in the values for k and x and you have a value in Joules. Then set that as equal to E(k)=(1/2)mv^2, where m is mass, and v is velocity.

Voila, you have the initial velocity!
 
Last edited:

Related Threads on Calculating velocity or acceleration

Replies
1
Views
2K
  • Last Post
Replies
17
Views
1K
Replies
3
Views
17K
  • Last Post
Replies
16
Views
10K
  • Last Post
Replies
4
Views
10K
Replies
1
Views
512
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
8
Views
2K
Top