- #1
g.uricchio
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Homework Statement
Two forces F1 and F2 are acting on a mass m=6.0 kg. The force F1 = 7.0i + 4.0j + 3.0k, in N. The acceleration of the mass is given by a = 2.0i + 7.0j + 4.0k, in m/s2. Calculate the magnitude of F2.
Homework Equations
F=m*a
The Attempt at a Solution
F1+F2=m*a
F2=(m*a)-F1
Magnitude of F12=72+42+32
Magnitude of F1=8.6 N
Magnitude of a2=22+72+42
Magnitude of a=8.31 m/s2
so...
shouldnt F2=(6.0 kg * 8.31 m/s2) - 8.6 N ?? (which is 41.24 N)The website where I submit my answer tells me that I am wrong please help me out.
Thankss!
--Graham