physical

Two forces FA and FB are applied to an object whose mass is 9.39 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 1.40 m/s2. However, when FA points due east and FB points due west, the acceleration is 0.950 m/s2, due east. Find (a) the magnitude of FA and (b) the magnitude of FB

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  1. Using Newton's second law: F=ma
    m=9.39 kg

    F=Fa+Fb=9.39*1.4=13.146
    F=Fa-Fb=9.39*0.950=8.9205

    Fa=(13.146+8.9205)/2=11.03 N
    Fb=(13.146-8.9205)/2=2.11 N

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  2. A traveling wave has wavelength 0.50 m, speed 20 m/s. Find the wave frequency.

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    posted by Bronco

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