(A) 1
(B) 2
(C) 3
(D) 0
(E) none of these- The acceleration is positive
(A) when t > 2
(B) for all t, t ≠ 2
(C) when t < 2
(D) for 1 < t < 3
(E) for 1 < t < 2 - The speed of the particle is decreasing for
(A) t > 2
(B) t < 3
(C) all t
(D) t < 1 or t > 2
(E) none of these
In Questions 22–24, a particle moves along a horizontal line and its position at time t is s = t^4 − 6t^3 +
12 t^2 + 3.
- The particle is at rest when t is equal to
(A) 1 or 2
(B) 0
(C)
(D) 0, 2, or 3
(E) none of these - The velocity, v, is increasing when
(A) t > 1
(B) 1 < t < 2
(C) t < 2
(D) t < 1 or t > 2
(E) t > 0