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Contact and Non-Contact Forces Study Guide
Items for Study Guide
1. SI Review Packet Motion
2. SI Review Packet PE
3. SI Review Packet Force
4. Webs for Contact and Non-Contact (action at a distance) Forces and Venn Diagram
5. This Sheet (Contact and Non-Contact Forces Study Guide)
6. Schoology Review: Contact and Non-Contact Forces
Items to review:
1. Group Lab Test (Building A Motor)
2. HW: (Static Electricity, Types of PE and KE, Free Body Diagram Practice)
3. Notes: (Potential Energy, Magnetic PE, Elastic PE, Electrical PE and Chemical PE)
4. Labs: (How an Electromagnet works, Force of Attraction, Determining the Force of Gravity,
Plotting a Magnetic Field, Where are the Poles, How can you study a magnetic field, Elastic
PE, Magnetic PE, Electrical PE, Chemical PE and Skate Park Gravitational PE).
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.
Calculations: Write the Formulas for each. Here is a practice problem
1. Elastic PE:
- If a rubber band has a stretch of 0.1 meters past equilibrium and a spring constant
of 40, determine the elastic PE:
2. Gravitational PE
- If I am standing on a desk 1 m off the floor and weigh 100 kg, what is my PE? Just as
we did with kinetic energy, let’s set up the problem.
-
What if I was standing on the desk and jumping out the window (my height is 21 m)?
3. Kinetic Energy
- Let’s practice calculating the kinetic energy of Mr. Hoogeveen running around
the track. Let’s say he weighs 100 kg (be nice) and can run 3 m/s. What would his
kinetic energy be?
4. Speed
Time
Distance
Speed
1.5 secs
0.5 meters
2.5 secs
1.2 meters
3.5 secs
3.5 meters
4.5 secs
4.2 meters
5.5 secs
5.4 meters
5. Distance
Using the graph below what it the distance traveled from A-B?
6. Force of Gravity
What would the force of attraction be between the two objects?
Attract with a force of
7M
2M
d
Possible Essay Questions:
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.
3. Be able to compare and contrast contact forces vs. forces at a distance.
4. Be able to describe how mass and distance affect gravity.
5. Be able to describe/detail evidence of how the poles of 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).