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Q. When you lift a bowling ball with a force of 82 N, the ball accelerates upward with an acceleration a. If you lift with a force of 99 N, the ball's acceleration is 2*a.

a) Find the weight of the bowling ball.

b) Find the acceleration a.

This is how I tried it but i dont know if this is correct:

82N-w=m*a

99-W=2ma