![]() In Figure 11.2, the bicycle is in motion with the rider staying upright. It is surprising to most people that, in fact, the bottom of the wheel is at rest with respect to the ground, indicating there must be static friction between the tires and the road surface. If the driver depresses the accelerator slowly, causing the car to move forward, then the tires roll without slipping. If the driver depresses the accelerator to the floor, such that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the surface of the road. For example, we can look at the interaction of a car’s tires and the surface of the road. People have observed rolling motion without slipping ever since the invention of the wheel. You may also find it useful in other calculations involving rotation. Understanding the forces and torques involved in rolling motion is a crucial factor in many different types of situations.įor analyzing rolling motion in this chapter, refer to Figure 10.20 in Fixed-Axis Rotation to find moments of inertia of some common geometrical objects. Think about the different situations of wheels moving on a car along a highway, or wheels on a plane landing on a runway, or wheels on a robotic explorer on another planet. Rolling motion is that common combination of rotational and translational motion that we see everywhere, every day. Use energy conservation to analyze rolling motion.Calculate the static friction force associated with rolling motion without slipping.Find the linear and angular accelerations in rolling motion with and without slipping.Explain how linear variables are related to angular variables for the case of rolling motion without slipping.Describe the physics of rolling motion without slipping.By the end of this section, you will be able to: ![]()
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