Is This Physics Calculation Correct for a Force Problem?

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The calculations presented for the force problem involve determining net forces in both the vertical and horizontal directions. The user applies Newton's second law, resulting in an acceleration of 9.9 m/s². A suggestion is made to use the more accurate value of g as 9.8 m/s² instead of 10 m/s², which may affect the results. Overall, the approach seems valid, but attention to the gravitational constant is recommended. Clarifying the expected value for gravity in the context of the class could help resolve any discrepancies.
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Attempt:

Y: Fnet = 0
n - wcos40 = 0
n = wcos40

X: Fnet = ma
1N + wsin40 -Fk = ma
1N + wsin40 -(.2)(wcos40) = ma
1N + 1.29 - .306 = .2a
a = 9.9 m/s2

I am doing it right way. I asked b/c i feel something is wrong...

Please help its urgent
 
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dsptl said:
Attempt:

Y: Fnet = 0
n - wcos40 = 0
n = wcos40

X: Fnet = ma
1N + wsin40 -Fk = ma
1N + wsin40 -(.2)(wcos40) = ma
1N + 1.29 - .306 = .2a
a = 9.9 m/s2

I am doing it right way. I asked b/c i feel something is wrong...

Please help its urgent


Your approach seems right to me. I noticed you were using g=10m/s2 for the acceleration due to gravity instead of the more correct g=9.8m/s2; is that value what your class is supposed to be using?
 

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