Posted by Lindsay on Sunday, November 4, 2007 at 8:32am.
A ball is thrown horizontally from a height of 16.01 m and hits the ground with a speed that is 5.0 times its initial speed. What was the initial speed?
This question really boggles my brain. I have no idea how to solve this, given only the height. Could someone please steer me in the right direction?

Physics  bobpursley, Sunday, November 4, 2007 at 8:38am
You can calculate the vertical final velocity from the height. Then, knowing the magnitude of speed, you can determine the horizontal speed.
5v=sqrt(vfvertical^2 + v^2)
square both sides, solve for v, the intial horizontal velocty.

Physics  Lindsay, Sunday, November 4, 2007 at 8:56am
Ok makes sense. The only part I'm a little confused about is finding the horizontal speed...which equation is that?
Answer This Question
Related Questions
 physics  A ball is thrown horizontally from a height of 24.93 m and hits the ...
 physics  A ball is thrown horizontally from a height of 24.93 m and hits the ...
 physics  A ball is thrown horizontally from a height of 18.18 m and hits the ...
 Physics  A ball is thrown horizontally from a height of 19.17 m and hits the ...
 Physics  A ball is thrown horizontally from a height of 16.01 m and hits the ...
 Physics  A stone thrown horizontally from a height of 7.8 m hits the ground at ...
 Physics  A red ball is thrown down with an initial speed of 1.3 m/s from a ...
 physics  A red ball is thrown down with an initial speed of 1.2 m/s from a ...
 physics  A blue ball is thrown upward with an initial speed of 24.1 m/s, from a...
 physics  A ball is thrown from the top of a building upward at an angle of 66...
More Related Questions