8th Grade - Balanced and Unbalanced Forces
Authored by Robbie Saint
Physics
8th Grade
NGSS covered
Used 628+ times
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This quiz focuses on the fundamental physics concepts of forces and motion, specifically targeting balanced and unbalanced forces at the 8th grade level. Students must demonstrate understanding of basic force types including gravity, friction, air resistance, and applied forces, along with their directional properties and effects on objects. The core concepts require students to identify forces by their characteristics, calculate net force by adding and subtracting force vectors in opposite directions, distinguish between balanced forces (net force equals zero, no change in motion) and unbalanced forces (net force greater than zero, causes acceleration), and recognize that unbalanced forces cause objects to accelerate in the direction of the greater force. Students need strong foundational knowledge of force units (Newtons), the relationship between force and motion, and the ability to analyze force diagrams showing multiple forces acting on objects simultaneously. Created by Robbie Saint, a Physics teacher in US who teaches grade 8. This comprehensive assessment serves multiple instructional purposes throughout a forces and motion unit, working effectively as a pre-assessment to gauge student understanding, formative assessment during instruction to identify misconceptions, review material before summative tests, or homework assignment to reinforce classroom learning. The quiz structure supports differentiated instruction by progressing from basic force identification to more complex net force calculations, allowing teachers to pinpoint exactly where students need additional support. The content directly aligns with NGSS MS-PS2-2 (Plan an investigation to provide evidence that the change in an object's motion depends on the sum of forces on the object and the mass of the object) and supports Common Core mathematical practices through vector addition and subtraction problems that require students to apply mathematical reasoning to physical science concepts.
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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the force that causes objects to fall to Earth?
Tags
NGSS.MS-PS2-4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the name of the units that we measure force in?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In which direction does gravity act?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When two objects rub together, what force do they produce
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these uses friction?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What force ultimately slows the roller coaster to a stop?
Tags
NGSS.MS-PS2-2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An _______ force must act on an object for it to CHANGE it's motion
Tags
NGSS.MS-PS2-2
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