Question

The park has added two more cars to the already existing roller coaster. If the park wants to maintain the speed of the roller coaster with the addition of the cars, what must it do? A) Increase the height a point A. B) Increase the heights at point A and B. C) Reduce the number of hills and dips in the course. D) Increase the friction between the wheels and the track.

Answer 1

Decrease the friction between the wheels and the track.

Step-by-step explanation:

Decrease the friction between the wheels and the track. Friction opposes motion. If the amount of friction is decreased, the speed of the cars should increase.

This answer is for the question on usa testprep

Answer 2

D because friction will slow it down going up hills (for safety reasons) and you go really fast going down.