Center of Mass & System of Particles WGU
Exam Command Center: OA Simulation
Practice, PA Rubric Execution Guide,
Competency Control & Smart Progress
System (2026–2027)
Description
The WGU Exam Command Center is a comprehensive,
system-based study resource designed for students at
Western Governors University (WGU) who want to take
full control of their learning process and approach
assessments with clarity, structure, and confidence. Built
specifically around WGU’s competency-based model, this
guide helps you shift from passive studying to active,
results-driven preparation.
Rather than relying on scattered notes or trial-and-error
studying, this resource functions as a central command
system—giving you the tools, structure, and strategy
needed to manage your course effectively, understand
expectations clearly, and perform consistently in both
1. Center of mass (COM) is the point where:
A. All forces act
,B. Entire mass can be assumed concentrated
C. Velocity is zero
D. Acceleration is zero
2. COM depends on:
A. Mass distribution
B. Velocity
C. Time
D. Force
3. For two masses m₁ and m₂, COM lies:
A. Closer to lighter mass
B. Closer to heavier mass
C. Midpoint always
D. Outside system
4. Formula for COM (two particles):
A. (m₁x₁ + m₂x₂)/(m₁ + m₂)
B. x₁ + x₂
C. m₁x₁
D. m₂x₂
5. If masses are equal, COM is:
A. At heavier mass
B. Midpoint
C. Outside
D. Infinite
6. COM of symmetric object lies at:
A. Edge
B. Center of symmetry
, C. Surface
D. Random
7. COM can lie:
A. Only inside
B. Only outside
C. Inside or outside
D. Nowhere
8. COM of ring lies:
A. On ring
B. At center
C. Outside
D. Edge
9. COM of uniform rod is at:
A. One end
B. Center
C. Outside
D. Random
10. COM of semicircle lies:
A. Center
B. On axis inside
C. Edge
D. Outside
11. Motion of COM depends on:
A. Internal forces
B. External forces only
C. Velocity
D. Time
Exam Command Center: OA Simulation
Practice, PA Rubric Execution Guide,
Competency Control & Smart Progress
System (2026–2027)
Description
The WGU Exam Command Center is a comprehensive,
system-based study resource designed for students at
Western Governors University (WGU) who want to take
full control of their learning process and approach
assessments with clarity, structure, and confidence. Built
specifically around WGU’s competency-based model, this
guide helps you shift from passive studying to active,
results-driven preparation.
Rather than relying on scattered notes or trial-and-error
studying, this resource functions as a central command
system—giving you the tools, structure, and strategy
needed to manage your course effectively, understand
expectations clearly, and perform consistently in both
1. Center of mass (COM) is the point where:
A. All forces act
,B. Entire mass can be assumed concentrated
C. Velocity is zero
D. Acceleration is zero
2. COM depends on:
A. Mass distribution
B. Velocity
C. Time
D. Force
3. For two masses m₁ and m₂, COM lies:
A. Closer to lighter mass
B. Closer to heavier mass
C. Midpoint always
D. Outside system
4. Formula for COM (two particles):
A. (m₁x₁ + m₂x₂)/(m₁ + m₂)
B. x₁ + x₂
C. m₁x₁
D. m₂x₂
5. If masses are equal, COM is:
A. At heavier mass
B. Midpoint
C. Outside
D. Infinite
6. COM of symmetric object lies at:
A. Edge
B. Center of symmetry
, C. Surface
D. Random
7. COM can lie:
A. Only inside
B. Only outside
C. Inside or outside
D. Nowhere
8. COM of ring lies:
A. On ring
B. At center
C. Outside
D. Edge
9. COM of uniform rod is at:
A. One end
B. Center
C. Outside
D. Random
10. COM of semicircle lies:
A. Center
B. On axis inside
C. Edge
D. Outside
11. Motion of COM depends on:
A. Internal forces
B. External forces only
C. Velocity
D. Time
