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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

• physical -

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

• physical -

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

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