View Single Post
Old 06-11-18, 08:42 AM
Senior Member
wphamilton's Avatar
Join Date: Apr 2011
Location: Alpharetta, GA
Posts: 14,529

Bikes: Nashbar Road

Mentioned: 65 Post(s)
Tagged: 0 Thread(s)
Quoted: 2518 Post(s)
Liked 70 Times in 41 Posts
Originally Posted by billyymc View Post
wph probably knows way more about physics than I do but - I believe a heavier object traveling at the same speed as a lighter object has greater momentum. Assuming there were no difference in drag or wind resistance (probably a bad assumption), the heavier object would decelerate more slowly than the lighter object.

wph - agree or no? I know there is a lot more complexity that could be brought into it, but that's as much as I remember from high school physics long ago.
I agree, assuming both are the same size and shape but different weights. Off hand, and I could be mis-remembering from applying the equations, but I keep it simple:
Acceleration is (Weight - Drag)/mass, from the force equation. weight is Mass * g.

So a = g - Drag/Mass. That's simple enough for me, the greater the weight the faster you accelerate (down). When the velocity is high enough that weight equals drag, you have terminal velocity, which is also higher for the heavier one.
wphamilton is offline