Basic Free-fall Problem

  • Thread starter The Eggman
  • Start date
  • #1

Homework Statement



A stone is thrown straight upward with a velocity of 10V and travels upward a distance X. What is the displacement when the object is traveling at 5V?

Homework Equations



xf=x0+v0t+1/2at^2

vf=v0+at

vf^2=v0^2+2ax

The Attempt at a Solution



.75X? Further, what's the most efficient way of solving for it?
 

Answers and Replies

  • #2
Spinnor
Gold Member
2,176
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With half the speed the stone has 1/4 of the kinetic energy left so can only go 1/4*X higher or it is at 3/4*X when the speed is 5V.
 

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