Which of the following is an example of negative acceleration?
a
a runner speeds up at the end of a race
b
a car slowing down at a stoplight
c
a car speeding up after leaving a stoplight
d
a car going at a constant velocity down a highway
b) a car slowing down at a stoplight
Negative acceleration, often referred to as deceleration, is when the velocity of an object decreases with respect to time. In option b, the car is slowing down, which means its speed is decreasing, so it is experiencing negative acceleration.