While David was riding his bike around the circular cul-de-sac by his house, he wondered if the constant circular motion was having any effect on his tires. What would be the best way for David to investigate this?
Measure the circumference of the tire before and after riding.
Time how long it takes him to ride 5 laps around his cul-de-sac.
Have someone videotape him riding and look for changes in the tires' performance.
Measure the wear on his treads before and after riding a certain number of laps.

Question

While David was riding his bike around the circular cul-de-sac by his house, he wondered if the constant circular motion was having any effect on his tires. What would be the best way for David to investigate this?
Measure the circumference of the tire before and after riding.
Time how long it takes him to ride 5 laps around his cul-de-sac.
Have someone videotape him riding and look for changes in the tires' performance.
Measure the wear on his treads before and after riding a certain number of laps.