Contact Forces
Grade 7•45 minutes•1.A Develop a model to describe interactions between two objects as they collide and show the changes that occur in the structure of both objects when one object is damaged as a result and also when neither object is damaged as a result. 1.B Ask questions that arise from observations of collisions between two objects in order to seek additional information about factors (causes) that might affect the outcome of such collisions.
Learning Objective
I can explain how contact forces cause changes in the structure of objects during collisions.
Practice Questions
This lesson includes 12 practice questions to reinforce learning.
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1. Define "normal force" and explain how it relates to the surface of an object.
2. Explain the difference between static and kinetic friction, providing an example of each from the video or your own experience.
3. A book is resting on a table. A) Gravity is acting on the book. B) The table is exerting a normal force on the book. C) The book is exerting a force on the table. D) All of the above.
...and 9 more questions
Educational Video
Contact Forces in Physics - Intro to Statics and Dynamics - Lesson Preview
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