Question

The position of an object attached to a spring is given by y(t) = cos(5t) − sin(5t), where t is time in seconds. In the first 4 seconds, how many times is the velocity of the object equal to 0?

Answer 1

Answer:

  6

Step-by-step explanation:

The object reaches an extreme position 6 times in the first 4 seconds. At each of those positions, the velocity is zero (as it changes sign).