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# cillator is described by x(t) = (10 cm) sin[(1 s^-1)t] What is the earliest time t 0 at which the oscillator's velocity is zero?

cillator is described by
x(t) = (10 cm) sin[(1 s^-1)t]

What is the earliest time t ≥ 0 at which the
oscillator’s velocity is zero?
1. t = 1 s
2. We cannot say, since we are not given
vx(0).
3. t =π/2s
4. t = 0 s
5. t = π s
6. It will be zero at any time x is zero.
7. t = ∞; the velocity is never zero for any
ﬁnite time.
8. t = 2π s
9. t =π/4s

It's not 2,4,5, or 6... Can't figure it out.
Thank you.

cillator is described by
x(t) = (10 cm) sin[(1 s^-1)t]
What is the earliest time t ≥ 0 at which the
oscillator’s velocity is zero?
1. t = 1 s
2. We cannot say, since we are not given
vx(0). 3....

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