Question

umm i need help...which equation would i use to solve the probnlem and how do i go about finding the answer?

Here it is: Sam tosses a ball horizontally off a footbridge at 3.1 m/s. How much time passes after he releases it until its speed doubles?

Answer 1

I answered this earlier today.

http://www.jiskha.com/display.cgi?id=1292877672