A racecar is able to speed around a curve on a racetrack with no problem when it is dry outside. However, when the racetrack is wet, the car skids off the track.
Which of these best explains why the car skids when it is wet?
A. Water decreases the force of friction on the track.
B. Water increases the force of gravity on the track.
C. Water decreases the force of gravity on the track.
D. Water increases the force of friction on the track.
A. Water decreases the force of friction on the track.
Explanation:
Both gravity and friction help to hold the car around the curve of the racetrack; so when the track is wet, water decreases the force of friction on the track.
