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N's 2nd law: an eq'n for acceleration 'a'

  • #1
Hello!

I was given two formulae for my Physics lab: ma=mg-T and T=Ma (using a pulley).

ma--> net force on small object (paper clip)
M--> larger mass (glider)
mg--> force of gravity
a--> acceleration
T--> tension of ribbon used

I'm supposed to combine the two equations to get one equation for acceleration. I thought about arranging them this way, but I think I'm wrong:

T=Ma (1)
T=mg-ma (2)
0 = -mg + (Ma+ma)

(the last part is difinitely messed up!)

Hope some can help me out! :confused:
 

Answers and Replies

  • #2
2,209
1
if T = Ma and T = mg - ma then mg - ma = Ma
 

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