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Questions and Answers
Conservation laws can be used even when the details of what is occurring inside a system aren't known.
Conservation laws can be used even when the details of what is occurring inside a system aren't known.
True
The momentum of an object never changes.
The momentum of an object never changes.
False
Kinetic energy is conserved in elastic collisions.
Kinetic energy is conserved in elastic collisions.
True
Linear momentum is conserved in all collisions.
Linear momentum is conserved in all collisions.
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Momentum is conserved only when there is no friction.
Momentum is conserved only when there is no friction.
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Work done within an isolated system can increase the energy of the system.
Work done within an isolated system can increase the energy of the system.
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Centripetal force changes linear momentum but not angular momentum.
Centripetal force changes linear momentum but not angular momentum.
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Kinetic energy is definitely conserved when two moving objects collide and rebound from each other.
Kinetic energy is definitely conserved when two moving objects collide and rebound from each other.
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Linear momentum is definitely conserved when two moving objects collide and rebound from each other.
Linear momentum is definitely conserved when two moving objects collide and rebound from each other.
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Kinetic energy is definitely not conserved when two moving objects collide, stick to each other, and move off together.
Kinetic energy is definitely not conserved when two moving objects collide, stick to each other, and move off together.
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Linear momentum is definitely conserved when two moving objects collide, stick to each other, and move off together.
Linear momentum is definitely conserved when two moving objects collide, stick to each other, and move off together.
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The energy stored in a pile driver is an example of gravitational potential energy.
The energy stored in a pile driver is an example of gravitational potential energy.
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The energy stored in a stretched spring is an example of gravitational potential energy.
The energy stored in a stretched spring is an example of gravitational potential energy.
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The energy of a body moving across a horizontal surface is an example of kinetic energy.
The energy of a body moving across a horizontal surface is an example of kinetic energy.
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The energy in the water at the top of a waterfall is an example of gravitational potential energy.
The energy in the water at the top of a waterfall is an example of gravitational potential energy.
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What does it mean for a physical quantity in a system to be conserved?
What does it mean for a physical quantity in a system to be conserved?
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Kinetic energy is conserved in what type of collision?
Kinetic energy is conserved in what type of collision?
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The linear momentum of a truck will be greater than that of a bus if:
The linear momentum of a truck will be greater than that of a bus if:
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What are the SI units of momentum?
What are the SI units of momentum?
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Work is done on an object when:
Work is done on an object when:
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If a force on an object is aimed opposite the direction of the object's velocity, the force does:
If a force on an object is aimed opposite the direction of the object's velocity, the force does:
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If a force on an object is aimed in the direction of the object's velocity, the force does:
If a force on an object is aimed in the direction of the object's velocity, the force does:
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If a force on an object is aimed perpendicular to the direction of the object's velocity, the force does:
If a force on an object is aimed perpendicular to the direction of the object's velocity, the force does:
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Kinetic energy may or may not be conserved when two moving objects collide and rebound from each other.
Kinetic energy may or may not be conserved when two moving objects collide and rebound from each other.
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Kinetic energy is definitely conserved in an elastic collision.
Kinetic energy is definitely conserved in an elastic collision.
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Linear momentum is definitely conserved in an elastic collision.
Linear momentum is definitely conserved in an elastic collision.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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Study Notes
Conservation Laws
- Conservation laws apply regardless of the inner workings of a system.
- Momentum can change; it is not constant unless specific conditions are met.
Kinetic Energy in Collisions
- Kinetic energy is conserved during elastic collisions, while it is not conserved during inelastic collisions.
- In collisions, linear momentum is always conserved, regardless of kinetic energy conservation.
- If two objects collide and rebound, kinetic energy conservation depends on the type of collision.
Types of Energy
- Gravitational potential energy, exemplified by a pile driver and water at the top of a waterfall, is significant in various contexts.
- Elastic potential energy can be stored in a spring, whereas kinetic energy is the energy of an object in motion.
- The energy stored in a stretched spring is not gravitational potential energy.
Momentum and Work
- Linear momentum is defined as the mass of an object multiplied by its velocity, with SI units being kg-m/s.
- Work is performed when a force causes an object to move, with different scenarios producing positive, negative, or no work based on the direction of the force relative to movement.
- Power signifies the rate at which work is done.
Collision Types
- Elastic collisions conserve kinetic energy; inelastic collisions do not.
- Angular momentum pertains to objects in circular motion.
Key Definitions
- Energy measures a system's ability to perform work.
- Work is calculated by multiplying force by the distance an object moves in the direction of the force.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your understanding of key concepts in Physics Chapter 3 with these flashcards. The focus is on conservation laws, momentum, and kinetic energy in systems. Challenge yourself with true or false statements related to these principles.
