Saturday

December 20, 2014

December 20, 2014

Posted by **Emily** on Friday, October 19, 2012 at 11:55pm.

To reach the rack, the ball rolls up a ramp that rises through a vertical distance of h = 0.572 m. What is the linear speed of the ball when it reaches the top of the ramp?

- physics -
**Elena**, Saturday, October 20, 2012 at 6:16amKE=PE

KE= KE(transl) +KE(rot) =

=m•v²/2+Iω²/2=

= m•v²/2+ (2mR²)• v²/5•2•R²=

= m•v²/2+ mv²/5 =0.7 mv²

0.7•m•v²=mgh

v=sqrt(g•h/0.7)

- physics -
**Emily**, Sunday, October 21, 2012 at 10:09pmThat is exactly the way I have been doing this problem and I keep getting the wrong answer. I keep getting 2.831 m/s

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