Rotational physics conceptual questions

AI Thread Summary
The discussion focuses on the forces acting on a motorcycle's tires during acceleration. The force exerted by the ground on both the rear and front tires is in the forward direction due to friction preventing slipping. An increase in the moment of inertia of the front tire will decrease the motorcycle's acceleration, as a larger moment of inertia results in slower acceleration. The reasoning provided for the forces and their directions aligns with the principles of rotational physics. Understanding these concepts is crucial for solving related physics problems effectively.
MozAngeles
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Homework Statement


A motorcycle accelerates from rest, and both tires rotate without slipping.
1. Is the force exerted by the ground on the rear tire in the forward or backward direction?explain.
2. Is the force exerted by the ground on the front tire in the forward or backward direction? explain
3. If the moment of inertia of the front tire is increased, will the motorcycle's acceleration increase, decrease, or remain the same?explain
any help would be nice please :)) thankssss


Homework Equations





The Attempt at a Solution


1. I put...forward because The frictional force is acting on the tire in the forward direction to keep it from slipping.
2.forward for the same reason
3.decrease because the bigger the moment of inertia the slower it will go
i don't know it my answers and or reasoning are right.. Can someone steer me in the right direction.
 
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You're exactly right on all three.

Another way to think about 1 and 2: the reason why the car accelerates is because the external force (friction from the ground) is exerted in the forward direction.
 

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