Question

At time t=0 seconds, a clock pendulum makes its maximum angle with the vertical, reaching a positive angle of 6 degrees in one minute, the pendulum swings back and fourth 20 times. Which of the following best expresses the angle the pendulum makes with the vertical in degrees as a function of time in seconds?

Answer 1

B. θ(t)= 6 cos (2π/3 t)

Explanation:

Answer 2

B) theta(t)= 6cos (2pi/3 t)

I’m not sure how to explain how I got the answer, but I did get it wrong and B was marked right. I hope this helps!