Rotational physics conceptual questions

Click For Summary
SUMMARY

The discussion centers on the forces acting on a motorcycle's tires during acceleration and the impact of moment of inertia on its performance. The force exerted by the ground on both the rear and front tires is definitively in the forward direction due to friction preventing slipping. Additionally, an increase in the moment of inertia of the front tire results in decreased acceleration of the motorcycle, as a larger moment of inertia requires more torque to achieve the same angular acceleration.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Basic knowledge of rotational dynamics
  • Familiarity with the concept of moment of inertia
  • Grasp of frictional forces and their role in motion
NEXT STEPS
  • Study the principles of Newton's second law in rotational motion
  • Learn about the relationship between torque and moment of inertia
  • Explore the effects of friction on vehicle dynamics
  • Investigate the equations of motion for rolling objects
USEFUL FOR

Physics students, mechanical engineers, and anyone interested in understanding the dynamics of vehicles and rotational motion.

MozAngeles
Messages
100
Reaction score
0

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.
 
Physics news on Phys.org
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.
 

Similar threads

High School Friction and Newton's laws in car braking systems
  • · Replies 10 ·
Replies
10
Views
2K
Direction of friction on rolling object
  • · Replies 30 ·
2
Replies
30
Views
4K
Undergrad How Does Torque Affect Balance on a Self-Balancing Electric Unicycle?
  • · Replies 10 ·
Replies
10
Views
4K
How Much Energy Is Needed to Move and Rotate a Weighted Tray Using Rubber Tires?
  • · Replies 3 ·
Replies
3
Views
2K
Why can we use this approximation in rotational work-kinetic energy theorem for small displacements?
  • · Replies 7 ·
Replies
7
Views
1K
Dynamic system of self balancing robot
  • · Replies 4 ·
Replies
4
Views
1K
Stabilizer Leg Linear Actuator Force to Jack up a Truck's rear tyres
  • · Replies 4 ·
Replies
4
Views
2K
Wooden sphere rolling on a double metal track
  • · Replies 97 ·
4
Replies
97
Views
6K
Rotational Motion: Final Translational Speed
  • · Replies 4 ·
Replies
4
Views
2K
Conceptual Newton's Law's Questions - HS Freshman Physics
  • · Replies 2 ·
Replies
2
Views
4K