• Support PF! Buy your school textbooks, materials and every day products Here!

Kinematics Question

  • #1

Homework Statement


Given v0=0 m/s, x0=0 m, and t=10 s, use all three kinematic equations together to find xf.

Homework Equations


vf=v0+at
xf=x0+v0t+1/2at2
vf2=v02+2a(xf-x0)

The Attempt at a Solution


The more I look at this, the less sense it makes. First off, I tried to plug the values into the first equation, but I don't have vf or a. The second equation, I don't have an a. The last one, I don't have a f nor acceleration. I can't see how I can solve this question without either the final velocity or acceleration.
 

Answers and Replies

  • #2
QuantumCurt
Education Advisor
726
166
I agree. This seems like an incomplete question. Is this out of a textbook? Is there a diagram or some other description in the heading for the section that provides more information? Is this something that is falling as a result of gravity?
 
  • #3
Nothing else is stated other than what is provided. It's actually a problem from a summer assignment that is due the first day of the semester. There's no other information in the header, as it just provides a brief overview of instructions for the section, which is "Algebra", and it basically covers all of physics, from kinematics to currents and circuits. It doesn't say that it's falling due to gravity, but if it were, then it would be solvable, but wouldn't require all 3 equations.
 
  • #4
20,135
4,209
They want the answer in terms of a.

Chet
 
  • Like
Likes Ryan Hwang
  • #5
They want the answer in terms of a.

Chet
If that were the case, then it wouldn't require all three equations would it? Just the second one, no?
 
  • #6
20,135
4,209
If that were the case, then it wouldn't require all three equations would it? Just the second one, no?
Yes. You are not given enough info to do more.
 
  • Like
Likes Ryan Hwang
  • #7
Yes. You are not given enough info to do more.
I agree. This seems like an incomplete question. Is this out of a textbook? Is there a diagram or some other description in the heading for the section that provides more information? Is this something that is falling as a result of gravity?
Thanks for all the help! :)
 

Related Threads on Kinematics Question

  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
6
Views
602
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
1
Views
797
Top