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April 20, 2014

Homework Help: physics

Posted by Vicki on Thursday, January 19, 2012 at 12:49pm.

A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the right as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal acceleration?
b. The ball has a positive acceleration when rolling up the ramp and a negative acceleration when rolling down the ramp.
c. The ball has a positive acceleration when rolling both up and down the ramp.
d. The ball has a negative acceleration when rolling up the ramp and a positive acceleration when rolling down the ramp.
e. The ball has a negative acceleration when rolling both up and down the ramp.
none of the above

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