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Inclined plane with pulley problem help?
A 7 kg block is connected to a 13 kg block by a string and a pulley. The 7 Kg block is on the incline, while the 13 kg block is hanging. There is an angle of 38 degrees with the horizontal, and the co efficient of friction is 0.24.
Here's what I did:
For the hanging mass
Fnet = ma
Fg - Ft = 13a
127.5 - Ft = 13a
-Ft = 13a - 127.5
Ft = -13a + 127.5
For the 7 kg mass
Fnet = ma
-Fgx + Ft + Ff = 7a
- 42.2 + 127.5 +0.24 (7) (9.81) cos38 = 7a +13a
4.9 = acceleration
What am I doing wrong? It would amazing if you could help me!!!
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IT'S A BIT LONG SORRY
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