February 20, 2017

Homework Help: Physics 221

Posted by K on Tuesday, December 8, 2009 at 5:32pm.

A 20g particle is moving to the left at 30 m/s. How much net work must be done on the particle to cause it to move to the right at 30 m/s.

The answer is 0J of work, and i understand the method of equations, but i don't understand the logic behind it.

Thanks for any help.

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