Physics
posted by Matthew .
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 2a. Find the weight of the ball, and the acceleration a.
I tried solving this via substitution algebra, but the answer still didn't work, PLEASE help!!!!

force=m(a+g)
force1=m(a1+g)
force1force=m(a1a)
10N=ma)
m=10/a
and theweight then is mg or 10g/a 
I think the 2a is meant to be 2 * a

10=2ma
m= 5/a
sorry.