1.

Due to some force F1 a body oscillates with period 4/5 sec and due to other force F2 oscillates with period 3/5 sec. If both forces act simultaneously, the new period will be [RPET 1997]

A.            0.72 sec                                  
B.            0.64 sec
C.            0.48 sec                                  
D.            0.36 sec
Answer» D.            0.36 sec


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