Force and PE Final
October 21, 2016 (approximate date)
Free-body diagram items to consider when preparing for this test:
1. Review Force Challenges I and II as well as the Roller Coaster Forces HW.
2. Understand the definitions of each of the 6 types of force and why a specific force might apply at
a given location.
3. Describe how unbalanced forces increase or decrease the speed of an object.
4. Describe how balanced forces can have either a constant speed or no speed at all.
5. Be able to describe the shape of various distant-time graphs based on the free-body diagram.
Force comparison questions to consider when preparing for the test:
1. Identify at least 3 similarities and 3 differences between each of the contact forces.
2. Identify at least 3 similarities and 3 differences between each of the forces at a distance.
Note: The graphic organizer we prepared in class will be an excellent study guide for this portion
of the test.
3. Be able to compare and contrast contact forces vs. forces at a distance (noncontact forces).
4. Be able to describe how mass and distance affect gravity.
5. Be able to describe/detail evidence of how the poles of a magnet are stronger than the edges.
6. Be able to describe and draw how to induce a static charge in an object such as a spoon.
7. Describe how gravity can act as an applied force.
8. Discuss how an object can move when something is touching it (contact forces).
9. Discuss how an object can move when something is not touching it (forces at a distance).
PE questions to consider when preparing for the test:
1. The graphic organizer we prepared in class will be an excellent study guide for this portion of the
test.
2. Be able to define potential energy and kinetic energy.
3. Be able to define each potential energy type (elastic, gravitational, chemical, magnetic, and
electrical).
4. Be able to calculate potential energy given a variety of data for elastic potential energy.
 EPE = ½ k x2
 Know that k is the spring constant and how it can change the EPE when it increases or
decreases.
 Know how to find x when given an equilibrium position and a stretched position.
5. Be able to calculate potential energy given a variety of data for gravitational potential energy.
 GPE = m g h
 Understand how changing the mass and height affect GPE.
6. Be able to look at a picture and identify high and low potential energy for all of the different
potential energy types.
7. Be able to compare similarities between the 5 types of potential energy.
 Discuss how x for EPE, h for GPE, distance from the magnetic pole are similar.
8. Be able to discuss lab questions that explore similarities and differences between each potential
energy types.
9. Be able to compare exothermic reactions and endothermic reactions and how they change the
temperature of a reaction.
10. Students can describe how voltage is used to measure electrical PE.