3-PS2-1
Provide evidence to explain the effect of multiple forces, including friction, on an object. Include balanced forces that do not change the motion of the object and unbalanced forces that do change the motion of the object.
- Clarification Statements:
- Descriptions of force magnitude should be qualitative and relative.
- Force due to gravity is appropriate but only as a force that pulls objects down.
- State Assessment Boundaries:
- Quantitative force magnitude is not expected in state assessment.
- State assessment will be limited to one variable at a time: number, size, or direction of forces