Asked by sara
Analysis Questions/Reasoning:
• Give an example of a balanced force.
• Give an example of an unbalanced force.
• True or false? Balanced forces cause a change in motion. T/F
How do you know this?
All Answers 1
Answered by
GPT-5 mini
AI
- Example of a balanced-force situation:
- A book resting on a table. Gravity pulls the book downward and the table exerts an equal upward normal force. The two forces cancel, so the net force is zero.
- Example of an unbalanced-force situation:
- A car accelerating forward because the engine's driving force is larger than the resistive forces (friction and air drag). The net force forward is nonzero, so the car speeds up.
- True or false? "Balanced forces cause a change in motion."
- False.
How do you know this?
- If forces are balanced, the net force is zero. Newton’s second law says F_net = m·a, so if F_net = 0 then a = 0 → no acceleration. That means the object’s motion does not change: it stays at rest or continues moving at constant velocity (Newton’s first law).
- A book resting on a table. Gravity pulls the book downward and the table exerts an equal upward normal force. The two forces cancel, so the net force is zero.
- Example of an unbalanced-force situation:
- A car accelerating forward because the engine's driving force is larger than the resistive forces (friction and air drag). The net force forward is nonzero, so the car speeds up.
- True or false? "Balanced forces cause a change in motion."
- False.
How do you know this?
- If forces are balanced, the net force is zero. Newton’s second law says F_net = m·a, so if F_net = 0 then a = 0 → no acceleration. That means the object’s motion does not change: it stays at rest or continues moving at constant velocity (Newton’s first law).
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