Questions and Answers
What are the forces acting on the crate pushed to the right at a constant speed?
What are the forces acting on the dresser being accelerated to the right?
What forces are present when a rightward-moving car is skidding to a stop?
What force is acting on a football moving upward and rightward?
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What are the forces acting on a small freight elevator moving upward?
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What forces act on a skydiver falling downward at a constant speed?
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What forces are present when a hockey puck glides to the right at constant speed?
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What forces act on a sledder coasting down a hill and slowing down?
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What force acts on a football at the peak of its trajectory?
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What forces are acting on a skydiver who has just opened a parachute?
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What forces act on a small freight elevator that is moving upward while slowing down?
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What forces act on a softball player diving head-first across the field?
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Study Notes
Free Body Diagrams of Various Scenarios
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Rightward Force on Crate:
- Forces: Up (Normal), Left (Friction), Down (Gravity), Right (Applied).
- Conditions: Constant speed applied force, air resistance ignored.
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Rightward Force on Dresser:
- Forces: Up (Normal), Left (Friction), Down (Gravity), Right (Applied + Extended).
- Conditions: Acceleration to the right, air resistance ignored.
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Skidding Car:
- Forces: Up (Normal), Left (Friction), Down (Gravity).
- Conditions: Rightward motion with locked wheels, air resistance ignored.
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Football Trajectory:
- Forces: Down (Gravity).
- Conditions: Moving upward and rightward towards peak, air resistance ignored.
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Elevator Cabin:
- Forces: Up (Tension), Down (Gravity).
- Conditions: Moving upward at constant speed, no contact with shaft, air resistance ignored.
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Skydiver at Constant Speed:
- Forces: Up (Air Resistance), Down (Gravity).
- Conditions: Downward descent with no speed change.
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Hockey Puck on Ice:
- Forces: Up (Normal), Down (Gravity).
- Conditions: Gliding to the right at constant speed, air resistance ignored.
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Sledder on Hill:
- Forces: Up (Normal), Left (Friction), Down (Gravity).
- Conditions: Coasting to the right while slowing down after hill descent, air resistance ignored.
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Football at Peak of Trajectory:
- Forces: Down (Gravity).
- Conditions: Initially kicked at a 40-degree angle, air resistance ignored.
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Skydiver with Open Parachute:
- Forces: Up (Air Resistance + Extended), Down (Gravity).
- Conditions: Slowing down after parachute deployment.
-
Elevator Cabin Slowing Down:
- Forces: Up (Tension), Down (Gravity + Extend).
- Conditions: Moving upward while decelerating, no contact with shaft, air resistance ignored.
-
Softball Player Diving:
- Forces: Up (Normal), Left (Friction), Down (Gravity).
- Conditions: Head-first slide to the right, air resistance ignored.
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Description
Test your understanding of free body diagrams through various scenarios, including forces acting on a crate, dresser, car, football, elevator, and skydiver. This quiz will challenge your ability to identify and analyze the forces at play in different contexts. Perfect for physics students looking to reinforce their knowledge.
