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I have a physics problem on dynamics. I did the question and received an answer, however, the answer is different from the one that i was given. I just want to know if I did something wrong (i probably did) or if the answer that was given is wrong. here it goes:

Proper storage of hay bales is essential for the survival of cattle during Canadian winters. A farmer uses a cable to exert an upward pull of 850N on a 81.6kg bale of hay at a local farm. Use a diagram and determine the acceleration of the bale as it is lifted onto a barn loft.

The answer that is given is 0.607m/s^2

Here's how I executed the problem:

a) drew a FBD diagram

^

l

l

l T=850N

O

l

\/ Fg

b) i found the force of support on the bale of hay (not sure if this is right)

F=ma

= 81.6kg x 9.81m/s^2

= 800N

c) subtracted this force from the tension force:

850N-800N= 50N

d) i used the formula again F=ma

a=F/m= 50N/81.6kg

= 0.613m/s^2

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# Homework Help: Dynamics hay bales Problem

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