Questions
A body executes S.H.M. under the action of a force F1 with a time period 7/6 seconds. If the force is changed to F2 it executes S.H.M. with time period 7/8 seconds. If both the forces F1 and F2 act simultaneously in the same direction on the body, then its time period in seconds is
detailed solution
Correct option is A
For a body executing simple harmonic motion, the force can be written as F=mω2y For the first force F1=m2πT12y and for the second force F2=m2πT22y. On combining the two forces F1+F2=Fnet , where Fnet=m2πTnet2y Substituting this in the equation F1+F2=Fnet, we getm2πTnet2y=m2πT12y+m2πT22y From the question, T1=76 s and T2=78 s1Tnet2=672+8721Tnet2=10049Tnet2=49100 Therefore, Tnet=710sTalk to our academic expert!
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