K Homework Set 11 Cosine Wave ? Part A Constants Periodic Table What is A in the

Question

K Homework Set 11 Cosine Wave ? Part A Constants Periodic Table What is A in the equation? The graph shows the position z of an oscllating object as a function of time t. (Figure 1)The equation of the graph is View Available Hint(s) z(t)-Acos(wt + ?). O T o M O 2M O MIT o T/2 where A is the amplitude, ? is the angular frequency, and ? is a phase constant. The quantities M, N, and T are measurements to be used in your answers. Submit Figure 1 of 1 ? Part B What is w in the equation? View Available Hint(s) 2T/T 2/T 1/T

Explanation / Answer

Part A - As it can be seen from the given graph that the maximum displacement (x) is denoted by M and we also know that maximum displacement from an equilibrium point is called as amplitude. So in the given equation

A = M  

so second option is the correct answer

Part B -

We can take w as angular velocity. so what is velocity. ???

velocity = distance by time

in this graph, distance travelled in one period is 2?

so, w = 2? / T

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