Author Question: A car is going around a racetrack at constant speed. The curves around the track have different ... (Read 116 times)

futuristic · **on:** Jul 28, 2018

A car is going around a racetrack at constant speed. The curves around the track have different radii. In which turn is the magnitude of the car's acceleration the greatest?
a. It is the greatest in the turn with the greatest radius.
b. It is the greatest in the turn with the smallest radius.
c. The acceleration is zero everywhere because of the constant speed. d. More information is needed to determine the answer.

Question 2

Consider a point on a bicycle tire that is momentarily in contact with the ground as the bicycle rolls across the ground with constant speed. The direction for the acceleration for this point at that moment is:
a. upward. c. forward. b. down toward the ground. d. at that moment the acceleration is zero.