Forces question HELP!

  • Thread starter wr1015
  • Start date
  • #1
wr1015
53
0
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 8 x a.
(a) Find the weight of the bowling ball.
N
(b) Find the acceleration a.
m/s2


Ok, i found part (a), which is 78.48 N. Now, on part (b) why wouldn't the acceleration be 99 N/ 8 kg, which is 12.37 m/s2? :confused:
 

Answers and Replies

  • #2
Doc Al
Mentor
45,462
1,951
What's the net force on the ball?
 
  • #3
HallsofIvy
Science Advisor
Homework Helper
43,021
971
Did you forget that you have to lift with the weight of the ball just to get it moving at all? The force in "F= ma" is 99N- mg.

As usual, Doc Al got there before me!
 

Suggested for: Forces question HELP!

Replies
6
Views
1K
Replies
9
Views
445
  • Last Post
Replies
7
Views
389
Replies
5
Views
885
  • Last Post
Replies
30
Views
581
Replies
5
Views
559
  • Last Post
Replies
2
Views
427
  • Last Post
Replies
3
Views
306
Top