The discussion centers on the mechanics of bicycle gear ratios and their impact on speed through rotational motion. Participants clarify that changing gears alters the angular velocity of the rear wheel, which in turn affects the bike's speed. The conversation emphasizes the role of torque and friction in this process, explaining that while changing gears does not directly increase speed, it optimizes the rider's ability to apply force to the pedals, thereby enhancing acceleration. Key concepts include the relationship between angular velocity, linear velocity, and the effects of friction on motion.
PREREQUISITESThis discussion is beneficial for mechanical engineers, bicycle enthusiasts, and anyone interested in understanding the physics behind bicycle performance and gear mechanics.
As Russ said, the torques are not the same. You would already know this if had followed my suggestion in post #58 and drawn the free body diagrams that I indicated. This is a very straightforward system to analyze if you use the free body diagrams. Show us what you can do. On the other hand, if you feel that you have advanced beyond the point where you need to use free body diagrams, I think you will now agree that you haven't.andyrk said:Why should two gears connected by the same chain rotate with the same torque?
No I can understand it by drawing the FBD. But I am studying this just for fun and I am lazy, so I don't want to bother with FBD and instead understand it just by discussion. But if that won't make me understand this completely, then I would have no other option than to draw the FBD. But I am just waiting till then.Chestermiller said:As Russ said, the torques are not the same. You would already know this if had followed my suggestion in post #58 and drawn the free body diagrams that I indicated. This is a very straightforward system to analyze if you use the free body diagrams. Show us what you can do. On the other hand, if you feel that you have advanced beyond the point where you need to use free body diagrams, I think you will now agree that you haven't.
Chet
You've already waited too long. Your admitted laziness has cost those of us who are trying to help you lots of our valuable time. Doesn't that matter to you?andyrk said:No I can understand it by drawing the FBD. But I am studying this just for fun and I am lazy, so I don't want to bother with FBD and instead understand it just by discussion. But if that won't make me understand this completely, then I would have no other option than to draw the FBD. But I am just waiting till then.