Question
Question: The displacement of an elastic wave is given by the function y = 3 sin wt + 4 cos wt where y is in c...
The displacement of an elastic wave is given by the function y = 3 sin wt + 4 cos wt where y is in cm and t is in s. The resultant amplitude is
A
3 cm
B
4 cm
C
5 cm
D
7 cm
Answer
5 cm
Explanation
Solution
Resultant amplitude
=32+42=9+16=5cm