A.The primary and secondary forces have same direction
B.The primary and secondary forces have same amplitude
C.The ratio of magnitude of primary forces of secondary forces is 2
D.The primary force has twoce the frequency of secondary force
A.The primary and secondary forces have same direction
B.The primary and secondary forces have same amplitude
C.The ratio of magnitude of primary forces of secondary forces is 2
D.The primary force has twoce the frequency of secondary force