Question

Which of the following is an example of negative acceleration?

a
a car speeding up after leaving a stoplight
b
a runner speeds up at the end of a race
c
a car going at a constant velocity down a highway
d
a car slowing down at a stoplight

Answer 1

d — a car slowing down at a stoplight.

Negative acceleration (deceleration) means acceleration opposite the direction of motion, which occurs when a car slows down.