Acar slowing down for a stop sign in an example of question 13 options: a.) negative speed. b.) negative acceleration. c.) positive speed. d.) positive acceleration.

Option (b) is the correct answer.

Explanation:

Acceleration means the rate of change of velocity of an object. Negative acceleration means a decrease in the velocity of an object. Positive acceleration means an increase in the velocity of an object.

When a car slows down for a stop sign then it is an example of negative acceleration as the speed of car is decreasing on seeing the stop signal.

Speed is the magnitude of velocity vector. Therefore, speed can never be negative.

Thus, we can conclude that a car slowing down for a stop sign is an example of negative acceleration.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).