Q1. A particle moves all along the x-axis with its position at time t given by x(t) = t3 - 2t + 4. Which of the given is the velocity at time t = 4?
Q2. The arrow is shot vertically upward. Its height p in the feet above ground after t seconds is given by p(t) = -16t2 + 160t + 384. How long does it take to reach its maximum point?
a) 2 sec
b) 12 sec
c) 5 sec
d) 384 sec