Unit 4 - Physics 121

Physics 121
Unit 4: Circular Motion & Gravity

Reading:

Sections 5.0 – 5.4, 5.6 – 5.8, 5.10

Homework:

Chapter 5 (Group 1)

Questions: 1, 5, 6, 16
Problems: 2, 4, 8, 9

Chapter 5 (Group 2)

Problems: 18, 25, 34, 63

Dates:

***Homework may be turned in during class, or placed in the box outside of my office.

Some Important Concepts from Chapter 5

If an object is under going uniform circular motion, what direction is the net force acting on the object?
If an object is going around in a circle, is it accelerating? If so, what direction is the acceleration and what is the acceleration called?
Is there such thing as centrifugal force?
If an object going around in a circle is released, what direction will it go?
If an object is turning and speeding up (or slowing down) which direction is the acceleration?
How far away from each other do two objects still feel some gravitational attraction (force)?
How does the acceleration of gravity g relate to Newton's universal gravitational constant G?
How does the force of the earth on an object, like a person, relate to the force of the object on the earth?
How is the orbit of the moon like an apple falling from a tree?
What does it mean to be "weightless"?