B. Energy change is understood in terms of forces--pushes or pulls.
C. Some forces act through physical contact, while others act at a distance.
Clarification for grades K-5: The target understanding for students in the elementary grades should focus on Big Ideas A, B, and C.
Clarification for grades 6-8: The target understanding for students in grades 6-8 should begin to transition the focus to a more specific definition of forces and changes in motion. Net forces create a change in motion. A change in momentum occurs when a net force is applied to an object over a time interval.
Grades 9-12, Standard 12: Motion - A. Motion can be measured and described qualitatively and quantitatively. Net forces create a change in motion. B. Momentum is conserved under well-defined conditions. A change in momentum occurs when a net force is applied to an object over a time interval.
Related Courses
Related Access Points
Related Resources
Lesson Plans
Original Student Tutorial
Perspectives Video: Professional/Enthusiasts
Teaching Idea
Video/Audio/Animation
Virtual Manipulatives
Original Student Tutorials Science - Grades K-8
Explore forces and how changes in forces can affect the motion of objects in this interactive tutorial.
Student Resources
Original Student Tutorial
Explore forces and how changes in forces can affect the motion of objects in this interactive tutorial.
Type: Original Student Tutorial
Perspectives Video: Professional/Enthusiast
Ancient weapons technologies developed by humans proved that they were better at physics than the saber-toothed cats.
Download the CPALMS Perspectives video student note taking guide.
Type: Perspectives Video: Professional/Enthusiast
Virtual Manipulatives
Students can create an applied force and see how it makes objects move. They can also make changes in friction and see how it affects the motion of objects.
- Identify when forces are balanced vs. unbalanced.
- Determine the sum of forces (net force) on an object with more than one force on it.
- Predict the motion of an object with zero net force.
- Predict the direction of motion given a combination of forces.
Type: Virtual Manipulative
This is a virtual manipulative which demonstrates the principles of force. Students can click on a man and push different objects of varying masses across the screen. The resulting forces (frictional and total force) are shown. Graphs show forces, position and acceleration as a function of time. Free body diagrams of all the forces can also be viewed.
Type: Virtual Manipulative
Parent Resources
Perspectives Video: Professional/Enthusiast
Ancient weapons technologies developed by humans proved that they were better at physics than the saber-toothed cats.
Download the CPALMS Perspectives video student note taking guide.
Type: Perspectives Video: Professional/Enthusiast
Virtual Manipulative
Students can create an applied force and see how it makes objects move. They can also make changes in friction and see how it affects the motion of objects.
- Identify when forces are balanced vs. unbalanced.
- Determine the sum of forces (net force) on an object with more than one force on it.
- Predict the motion of an object with zero net force.
- Predict the direction of motion given a combination of forces.
Type: Virtual Manipulative