Podcast
Questions and Answers
Balanced forces occur when two or more forces acting on an object are equal in magnitude but act in ______ directions.
Balanced forces occur when two or more forces acting on an object are equal in magnitude but act in ______ directions.
opposite
If the net force is ______, the object remains at rest or continues moving in the same way.
If the net force is ______, the object remains at rest or continues moving in the same way.
0 N
An example of balanced forces is a book resting on a table, where gravity pulls the book downward and the table applies an ______ upward force.
An example of balanced forces is a book resting on a table, where gravity pulls the book downward and the table applies an ______ upward force.
equal
Unbalanced forces occur when the forces acting on an object are not ______ in size.
Unbalanced forces occur when the forces acting on an object are not ______ in size.
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When pushing a box with 60 N of force to the right and friction resists with 40 N to the left, the net force is ______ N to the right.
When pushing a box with 60 N of force to the right and friction resists with 40 N to the left, the net force is ______ N to the right.
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A car slowing down upon pressing the brakes demonstrates ______ forces at work.
A car slowing down upon pressing the brakes demonstrates ______ forces at work.
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Acceleration occurs when an object experiences a net force that is greater than ______.
Acceleration occurs when an object experiences a net force that is greater than ______.
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Gravity pulling a falling object downward is an example of ______ forces.
Gravity pulling a falling object downward is an example of ______ forces.
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If air resistance is small, the object will ______ towards the ground.
If air resistance is small, the object will ______ towards the ground.
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Distance is the total length of the path an object travels from one point to another, regardless of ______.
Distance is the total length of the path an object travels from one point to another, regardless of ______.
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Distance is always a ______ value.
Distance is always a ______ value.
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Displacement is the straight-line distance between the starting point and the ending point, along with the ______.
Displacement is the straight-line distance between the starting point and the ending point, along with the ______.
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Speed is the measure of how fast an object is moving, or the distance ______ divided by the time taken.
Speed is the measure of how fast an object is moving, or the distance ______ divided by the time taken.
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Velocity is the speed of an object in a specific ______.
Velocity is the speed of an object in a specific ______.
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Speed can be constant or ______.
Speed can be constant or ______.
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Velocity can be positive, negative, or ______ depending on direction.
Velocity can be positive, negative, or ______ depending on direction.
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Study Notes
Balanced Forces
- Balanced forces occur when two or more forces acting on an object are equal in magnitude but act in opposite directions
- These forces cancel each other out, resulting in no change in the object's motion
- Key Characteristic: Net Force = 0 N (Newtons)
- If the object is at rest, it stays at rest
- If the object is in motion, it continues moving at the same speed and in the same direction
- No Acceleration occurs because the net force is zero
Examples of Balanced Forces
- A book resting on a table: Gravity pulls the book down, and the table applies an equal upward force (normal force)
- A person standing still on the ground: The force of gravity pulling the person down is balanced by the ground pushing up
- A car moving at a constant speed on a straight road: The engine force pushing the car forward is balanced by the friction and air resistance pushing backward
Unbalanced Forces
- Unbalanced forces occur when the forces acting on an object are not equal in size or do not act in exactly opposite directions
- This causes a net force greater than zero, resulting in a change in the object's motion
- Key Characteristic: Net Force ≠ 0 N
- The forces are unequal and do not cancel each other out
- The object will accelerate in the direction of the greater force
Changes in Motion
- An object may start moving, speed up, slow down, or change direction
- Acceleration occurs in the direction of the greater force
Examples of Unbalanced Forces
- Pushing a Box: If you push a box with 60 N of force to the right and friction resists with 40 N to the left, the net force is 20 N to the right. The box will move to the right.
- Kicking a Soccer Ball: The force from your foot is greater than the resisting forces, causing the ball to accelerate
- A Car Slowing Down: When you press the brakes, friction between the tires and the road is greater than the forward motion, causing the car to decelerate.
- A Falling Object: Gravity pulls the object downward. If air resistance is small, the object will accelerate towards the ground.
Distance
- Distance is the total length of the path an object travels from one point to another, regardless of direction
- It is a scalar quantity, meaning it only has magnitude (size) and no direction
- It is always a positive value
- Measured in meters (m) in the SI unit system
Displacement
- Displacement is the straight-line distance between the starting point and the ending point, along with the direction
- It is a vector quantity, meaning it has both magnitude and direction
- It can be positive, negative, or zero depending on the direction
- Measured in meters (m)
Speed
- Speed is the measure of how fast an object is moving, or the distance traveled divided by the time taken
- It is a scalar quantity (no direction)
- Measured in meters per second (m/s) or kilometers per hour (km/h)
- Speed can be constant or changing
Velocity
- Velocity is the speed of an object in a specific direction
- It is a vector quantity (has both magnitude and direction)
- Measured in meters per second (m/s)
- Can be positive or negative depending on the direction
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Description
Explore the concept of balanced and unbalanced forces in this quiz. Understand how these forces affect the motion of objects, including real-life examples such as a book on a table and a moving car. Test your knowledge of net force and the conditions for equilibrium.
