(A) t = 4
(B) t = 5
(C) t = 6
(D) t = 8
(E) never- The object’s average acceleration (in ft/sec^2 ) for this 8-sec interval was
(A) −2
(B)
(C) 0
(D)
(E) 1 - If a block of ice melts at the rate of cm^3 /min, how much ice melts during the first 3 min?
(A) 8 cm^3
(B) 16 cm^3
(C) 21 cm^3
(D) 40 cm^3
(E) 79 cm^3 - A particle moves counterclockwise on the circle x^2 + y^2 = 25 with a constant speed of 2 ft/sec.
Its velocity vector, v, when the particle is at (3, 4), equals
(A)
(B)
(C)
(D)
(E)
BC ONLY
- Let R = a cos kti + a sin ktj be the (position) vector xi + yj from the origin to a moving point
P(x, y) at time t, where a and k are positive constants. The acceleration vector, a, equals
(A) −k^2 R
(B) a^2 k^2 R