A cart starts from rest and its velocity at the end of each successive second is 5 m/s, 8 m/s and 11 m/s. Which statement best describes the cart’s acceleration during these three seconds?
a) It has uniform acceleration of 3m/s2 throughout the motion.
b) It has uniform retardation since the increments in velocity keep decreasing.
c) It has non-uniform acceleration because the change in velocity is not the same each second.
d) It has uniform acceleration of 311m/s2 (about 3.7m/s2) throughout the motion.