Question

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

Answer 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

Answer 2

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

Answer 3

Two forces and are applied to an object whose mass is 19.4 kg. The larger force is . When both forces point due east, the object's acceleration has a magnitude of 0.619 m/s2. However, when points due east and points due west, the acceleration is 0.501 m/s2, due east. Find (a) the magnitude of and (b) the magnitude of .