Posted by **Matt** on Sunday, October 18, 2009 at 1:18pm.

When you lift a ball with a force of 82N, the ball accelerates upward with an acceleration of a. If you lift with a force of 92N, the balls acceleration is 2*a.

Find the weight of the ball, and the acceleration a.

I know that

82 = ma +mg

92 = m2a + mg

That logic is correct right? just don't know how to figure out m or a :(

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