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Circular Motion / Gravitation Note-Taking Guide
Chapter 5, sections 1 & 2
 Define uniform circular motion.
 Define period and record equation 5.1.
 Describe the velocity of an object moving in uniform circular motion.
 Identify the direction of the instantaneous velocity of an object moving in a circle.
 Record equation 5.2.
Chapter 5, section 3
 Define centripetal force.
 Record equation 5.3.
 Paraphrase the first paragraph on page 140.
Pages 101-102 (‘Apparent Weight’) and Chapter 5, section 6 (‘Apparent Weightlessness’)
 Identify the force that is responsible for an object’s apparent weight.
 Describe the type of motion that causes the apparent weight to differ from the true weight.
 Describe the concept of artificial gravity.
Chapter 5, section 7
 Copy the free body diagram on page 151 and the four equations that relate to that diagram.
Chapter 4, section 7
 Re-state the Law of Universal Gravitation and record equation 4.3 (as well as the value for
the constant).
 Copy Figure 4.11.
 Identify what ‘r’ specifically refers to.
 Describe the relationship between weight and distance.
 Record the equation that can be used to calculate the value of ‘g’.
Unit Objectives
Students will:
1. describe circular motion as an accelerated motion
2. define and calculate centripetal force and centripetal acceleration
3. identify the directions of the instantaneous velocity, centripetal force, and centripetal
acceleration of an object moving in a circular path
4. identify the force(s) responsible for providing the centripetal force to an object in various
horizontal and vertical circular motion situations
5. describe the relationship among the speed of an object moving in a circle, the radius of
the circular path, and the resulting centripetal acceleration of the object; model this
relationship mathematically; and apply this model to various horizontal and vertical
circular motion situations
6. describe the relationship among the speed of an object moving in a circle, the mass of
the object, the radius of the circular path, and the centripetal force that is acting on the
object; model this relationship mathematically; and apply this model to various horizontal
and vertical circular motion situations
7. describe the role of gravity in vertical circular motion situations
8. describe the concept of apparent weight, relate it to the concept of g-force, and apply
both concepts to real-world circular motion situations
9. describe the relationships inherent in the Law of Universal Gravitation
10. apply the Law of Universal Gravitation to real-world situations in which two or more
bodies act on one another
11. calculate the gravitational field strength (g) at various locations in the universe