Page 2 - 11-phy-5 Circular Motion

5. Circular Motion eLearn.Punjab
Learning Objectives

After studying this chapter the students will be able to:

1. Define angular motion.
2. Define angular displacement, angular velocity and angular acceleration.
3. Define radian and convert an angle from radian measure to degree and vice verse.

4. Use the equation S = rq and v = rw

5. Describe qualitatively motion in a curved path due to a perpendicular force and understand
the centripetal acceleration in case of uniform motion in a circle.

6. Derive equation = ac = rw2 = v2/r and Fc = mw2r = mv2/r

7. Understand and describe moment of inertia of a body.
8. Understand the concept of angular momentum.
9. Describe examples of angular momentum.
10. Understand and express rotational kinetic energy of a disc and a hoop on an inclined plane.
11. Describe the motion of artificial satellites.
12. Understand that the objects in satellites appear to be weightless.
13. Understand how and why artificial gravity is produced.
14. Calculate the radius of geo-stationary orbits and orbital velocity of satellites.
15. Describe Newton’s and Einstein’s views of gravitation.

We have studied velocity, acceleration and the laws of motion, mostly as they are involved in
rectilinear motion. However, many objects move in circular paths and their direction is continually
changing. Since velocity is a vector quantity, this change of direction means that their velocities are
not constant. A stone whirled around by a string, a car turning around a corner and satellites in
orbits around the Earth are all examples of this kind of motion.

In this chapter we will study, circular motion, rotational motion, moment of inertia, angular
momentum and the related topics.

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