Questions and Answers
What forces are acting on an eagle as it glides through the air along a horizontal path?
What forces are acting on a dog being pulled by his dog chain across the ground at a constant speed?
What forces act on an elevator that is descending slowly without contact with the walls?
What forces are acting on a physics book sliding across a level table?
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What force is acting on a football moving upward and rightward toward the peak of its trajectory?
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What forces are acting on a book that is at rest upon a table?
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What forces are acting on a large crate being pushed leftward across the floor at a constant velocity?
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What forces are acting on a sign suspended by two cables at rest?
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What forces are acting on a truck that skids to a stop from a very high speed?
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What forces are acting on a person standing on the ground?
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What forces are acting on a sledder slowing down while gliding into the wind across unpacked snow?
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What forces act on a parachutist falling to the ground at a constant velocity?
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Study Notes
Forces in Motion
- An eagle glides smoothly through the air, highlighting the balance between air resistance and gravitational forces.
- A dog is pulled across the ground at a constant speed by a chain, demonstrating the interplay of tension, gravity, normal force, and friction despite the lack of air resistance.
Elevator Dynamics
- The descent of an elevator, suspended by cables and moving slowly, showcases the effects of gravity countered by tension without any interaction with the elevator shaft walls.
Sliding Objects
- A physics book sliding on a level table affirms the impacts of gravity, friction, and the normal force, emphasizing the forces at play in horizontal movement.
Projectile Motion
- A football ascending towards its peak demonstrates that only gravitational force is acting on it, disregarding air resistance.
Static Objects
- A book resting on a table illustrates the balance of the normal force acting upward against gravity pulling downward.
Constant Velocity Dynamics
- A large crate pushed leftward at a constant speed reveals the combined effects of gravity, normal force, friction, and an applied force, remaining balanced in motion.
Suspended Objects
- A sign hanging at rest from two cables reflects the balance of tension and gravitational force acting on it.
Stopping Dynamics
- A truck skidding to a halt from high speed emphasizes the factors of air resistance, normal force, gravity, and friction at play during deceleration.
Standing Force Interactions
- A person standing on the ground is an example of the balance between gravitational force pulling down and the normal force exerted by the ground.
Impact of Wind Resistance
- A sledder slowing down while gliding into the wind across snow signifies the forces of air resistance, gravity, normal force, and friction affecting movement.
Parachutist Dynamics
- A parachutist falling at a constant velocity illustrates the balance between gravitational force and air resistance, resulting in terminal velocity.
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Description
Test your understanding of physics concepts with these flashcards. Each card presents a scenario related to forces such as air resistance, friction, and tension, challenging you to define and explain the underlying principles. Perfect for quick revision or studying foundational physics concepts.
