Podcast
Questions and Answers
Which of the following scenarios best illustrates a situation where balanced forces are acting on an object?
Which of the following scenarios best illustrates a situation where balanced forces are acting on an object?
- A skydiver falling through the air before opening their parachute.
- A book resting on a table. (correct)
- A soccer ball being kicked across a field.
- A car accelerating from 0 to 60 mph.
A rope is being used to pull a heavy box across a rough floor. Which of the following forces are MOST likely acting on the box?
A rope is being used to pull a heavy box across a rough floor. Which of the following forces are MOST likely acting on the box?
- Applied force and gravitational force.
- Electrostatic force and normal force.
- Tension force and magnetic force.
- Tension force, frictional force, applied force, normal force, and gravitational force。 (correct)
A positively charged balloon is brought near a wooden door. Which of the following forces is MOST likely to occur?
A positively charged balloon is brought near a wooden door. Which of the following forces is MOST likely to occur?
- Magnetic Force
- Electrostatic force. (correct)
- Gravitational force.
- Applied force.
Which of the following is the BEST example of a non-contact force affecting an object on Earth?
Which of the following is the BEST example of a non-contact force affecting an object on Earth?
A student is pushing a box across the floor with a force of 50 N to the right, but friction is exerting a force of 20 N to the left. What is the net force acting on the box?
A student is pushing a box across the floor with a force of 50 N to the right, but friction is exerting a force of 20 N to the left. What is the net force acting on the box?
Imagine two magnets are placed near each other. One has its north pole facing the other's south pole. What can you infer about the situation?
Imagine two magnets are placed near each other. One has its north pole facing the other's south pole. What can you infer about the situation?
Which of the following claims is NOT an effect that forces can have on an object?
Which of the following claims is NOT an effect that forces can have on an object?
If an object is accelerating, what MUST be true about the forces acting on it?
If an object is accelerating, what MUST be true about the forces acting on it?
Flashcards
Force (F)
Force (F)
An interaction between bodies, a push or pull that can alter motion or shape.
Magnitude of Force
Magnitude of Force
A force's strength or intensity.
Direction of Force
Direction of Force
The way in which a force is applied (e.g., up, down, left, right).
Contact Force
Contact Force
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Frictional Force
Frictional Force
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Normal Force
Normal Force
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Non-Contact Force
Non-Contact Force
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Balanced Forces
Balanced Forces
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Unbalanced Forces
Unbalanced Forces
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Study Notes
- The lesson is a physics class.
- The topics covered are force, characteristics of force, balanced and unbalanced forces.
Force
- Defined as an interaction between two bodies.
- Involves a push or a pull.
- It can cause objects to move, stop, change direction, or change shape.
- The unit of measurement is the Newton (N)
- Can be contact or non-contact.
Force Characteristics
- Magnitude (Size): Refers how strong the force is.
- Direction: Describes the way the force is applied.
- It is a vector quantity.
Contact Force
- Occurs when two objects are touching.
- Includes:
- Frictional force: Opposes motion between two forces in contact.
- Applied force: Is applied to an object by a person or another object.
- Normal force: Upward force exerted by a surface to support the weight of an object resting on it.
- Tension force: Is transmitted through a string, rope, or cable when it is pulled tight.
Non-Contact Force
- It can act even if objects are not touching.
- Gravitational Force:
- It’s the force of attraction between two objects due to their mass.
- Earth's gravity pulls objects toward its center.
- Magnetic Force:
- Exerted by magnets.
- It attracts or repels objects depending on the poles.
- Electrostatic Force:
- It’s between charged particles or objects.
- Like charges repel, and opposite charges attract.
Balanced and Unbalanced forces
- Balanced Forces:
- Occur when the forces acting on an object are equal in size and opposite in direction.
- These forces result in no change in the object's motion.
- Unbalanced Forces:
- Occur when the forces acting on an object are not equal or not opposite.
- Cause a change in the object's motion.
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Description
Explore force as an interaction causing motion or deformation. Learn characteristics of force including magnitude and direction. Differentiate between contact forces like friction, applied, normal, and tension forces versus non-contact forces.
