korosh23 one year ago Physics 11 Question! A 12.0 kg fish hangs from a hook and line that has a tension of 85N on it. Draw a FBD and find the acceleration of the fish.

1. korosh23

I know how to find the acceleration by the formula F=ma. However, I do not understand if the tension force is downward or upward? Also, is there any Normal force?

2. anonymous

You have to draw these out. Tension is in the direction of the line, away from the body. The line holds the fish up, so tension is up. There's no normal normal force because there's no surface. |dw:1442089808433:dw|

3. korosh23

Ok W= (12)(9.8) W=117.6 N How can I find acceleration? From which force, W or T?

4. anonymous

$\sum F =ma$ $T-W=ma$ $a=\frac{ T-mg }{ m }$

5. korosh23

Oh right, finding the Fnet! Thank you for your explanation :)

6. anonymous

you're welcome