A Weight Is Oscillating on the End of a Spring

question 15

Multiple Choice

A weight is oscillating on the end of a spring (see figure) .The position of the weight relative to the point of equilibrium is given by , where y is the displacement (in meters) and t is the time (in seconds) .Find the times when the weight is at the point of equilibrium (y = 0) for . ​ ​
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• A)0.05sec, 0.49sec, 0.94sec
• B)0.05sec, 0.05sec, 0.94sec
• C)-0.40sec, 0.49sec, 0.94sec
• D)-0.40sec, 0.49sec, -0.40sec
• E)0.05sec, -0.40sec, 0.94sec

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