Podcast
Questions and Answers
A car is traveling at a constant speed of 60 km/h along a straight road. Which of the following statements is TRUE about the forces acting on the car?
A car is traveling at a constant speed of 60 km/h along a straight road. Which of the following statements is TRUE about the forces acting on the car?
A ball is at rest on a table. What is the net force acting on the ball?
A ball is at rest on a table. What is the net force acting on the ball?
A book is pushed across a table with a constant velocity. Which of the following statements is TRUE about the forces acting on the book?
A book is pushed across a table with a constant velocity. Which of the following statements is TRUE about the forces acting on the book?
Two forces are acting on an object. One force is 10 N to the right and the other is 5 N to the left. What is the net force acting on the object?
Two forces are acting on an object. One force is 10 N to the right and the other is 5 N to the left. What is the net force acting on the object?
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A ball is thrown straight up into the air. What is the direction of the net force acting on the ball when it reaches its highest point?
A ball is thrown straight up into the air. What is the direction of the net force acting on the ball when it reaches its highest point?
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A student pushes a box across a smooth floor with a constant force. The box accelerates. What is the reason for this acceleration?
A student pushes a box across a smooth floor with a constant force. The box accelerates. What is the reason for this acceleration?
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A skydiver is falling at a constant speed. Which of the following statements is TRUE?
A skydiver is falling at a constant speed. Which of the following statements is TRUE?
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A heavy box and a light box are pushed with the same force. Which box will accelerate more?
A heavy box and a light box are pushed with the same force. Which box will accelerate more?
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Flashcards
Balanced Forces
Balanced Forces
Two or more forces acting on an object that cancel each other out, resulting in no change in motion.
Unbalanced Forces
Unbalanced Forces
Two or more forces acting on an object that do not cancel out, causing a change in motion.
Net Force
Net Force
The overall force acting on an object, determined by adding all forces.
Types of Forces
Types of Forces
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Acceleration
Acceleration
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Inertia
Inertia
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Friction
Friction
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Mass and Acceleration
Mass and Acceleration
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Study Notes
Balanced Forces
- Balanced forces are two or more forces acting on an object that cancel each other out.
- The net force on the object is zero.
- The object's motion does not change. If it was already moving at a certain speed, it continues moving at that speed. If it was stationary, it stays stationary.
- Examples include: a book resting on a table (gravity pulling down, table pushing up). A car moving at a constant speed (engine pushing forward, friction pushing backward).
Unbalanced Forces
- Unbalanced forces are two or more forces acting on an object that do not cancel each other out.
- The net force on the object is not zero.
- The object's motion changes.
- If the object was at rest, it will begin to move.
- If the object was moving, it will speed up, slow down, or change direction.
- Examples include: pushing a shopping cart, kicking a soccer ball, dropping a ball.
- The size of the unbalanced force determines how quickly the object's motion changes. A stronger unbalanced force results in a bigger change.
Determining Net Force
- Net force is the overall force acting on an object.
- To determine if forces are balanced or unbalanced, add up all the forces.
- If the sum is zero, forces are balanced.
- if the sum is not zero, forces are unbalanced.
Types of Forces
- Different kinds of forces can act on objects.
- Gravity pulls objects towards the Earth.
- Friction opposes motion between surfaces in contact.
- Applied force is a force applied to an object by a person or another object.
- Normal force is the support force exerted upon an object that is in contact with another stable object.
- Forces are measured in Newtons (N).
Acceleration
- Acceleration is the rate at which velocity changes.
- Acceleration can be a change in speed or a change in direction.
- Unbalanced forces cause acceleration.
- The greater the net force, the greater the acceleration.
- Mass also affects acceleration. If one object has a greater mass than another under the same unbalanced force, the object with less mass will accelerate at a faster rate.
Inertia
- Inertia is the tendency of an object to resist a change in its motion.
- More massive objects have more inertia.
- A stationary object stays stationary because of inertia, and a moving object continues moving in the same direction and at the same speed because of inertia.
- It takes an outside force (i.e. a net force) to change the motion of an object.
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Description
Test your understanding of balanced and unbalanced forces through this engaging quiz. Explore how these forces impact the motion of objects, with real-world examples to reinforce your learning. Perfect for students looking to grasp fundamental physics concepts.
