Podcast
Questions and Answers
A hockey puck is sliding across frictionless ice. Which of Newton's Laws best explains why the puck eventually comes to a stop?
A hockey puck is sliding across frictionless ice. Which of Newton's Laws best explains why the puck eventually comes to a stop?
- Newton's First Law, due to the conservation of momentum.
- Newton's Third Law, due to the equal and opposite reaction force.
- Newton's First Law despite the absence of friction, air resistance or other external forces will result in slowed movement. (correct)
- Newton's Second Law, due to the force of gravity.
A car accelerates from rest to a speed of 20 m/s in 5 seconds. If the net force acting on the car is doubled, what effect does this have on the car's acceleration, assuming the mass remains constant?
A car accelerates from rest to a speed of 20 m/s in 5 seconds. If the net force acting on the car is doubled, what effect does this have on the car's acceleration, assuming the mass remains constant?
- The acceleration will remain the same.
- The acceleration will be doubled. (correct)
- The acceleration will be halved.
- The acceleration will quadruple.
Two objects, one with mass $m$ and the other with mass $2m$, are dropped from the same height. Ignoring air resistance, which of the following statements is true about their kinetic energy just before impact?
Two objects, one with mass $m$ and the other with mass $2m$, are dropped from the same height. Ignoring air resistance, which of the following statements is true about their kinetic energy just before impact?
- Both objects will have the same kinetic energy.
- The object with mass $2m$ will have four times the kinetic energy of the object with mass $m$.
- The object with mass $m$ will have twice the kinetic energy of the object with mass $2m$.
- The object with mass $2m$ will have twice the kinetic energy of the object with mass $m$. (correct)
A pendulum swings back and forth. At which point in its swing is the potential energy the highest, assuming no energy loss due to friction or air resistance?
A pendulum swings back and forth. At which point in its swing is the potential energy the highest, assuming no energy loss due to friction or air resistance?
A closed system consists of two colliding objects. Which of the following quantities is conserved in this system regardless of whether the collision is elastic or inelastic?
A closed system consists of two colliding objects. Which of the following quantities is conserved in this system regardless of whether the collision is elastic or inelastic?
A mass attached to a spring oscillates in simple harmonic motion. If the amplitude of the oscillation is doubled, what happens to the total energy of the system?
A mass attached to a spring oscillates in simple harmonic motion. If the amplitude of the oscillation is doubled, what happens to the total energy of the system?
A rotating object has its moment of inertia doubled while its angular velocity is halved. What happens to its rotational kinetic energy?
A rotating object has its moment of inertia doubled while its angular velocity is halved. What happens to its rotational kinetic energy?
How does the gravitational force between two objects change if the distance between their centers is doubled and one of the masses is also doubled?
How does the gravitational force between two objects change if the distance between their centers is doubled and one of the masses is also doubled?
A block of wood is floating in water. What happens to the buoyant force on the block if the density of the water is increased?
A block of wood is floating in water. What happens to the buoyant force on the block if the density of the water is increased?
Classical Mechanics provides an accurate description of motion under most conditions, but it begins to break down under particular conditions. Which of the following conditions would cause Classical Mechanics predictions to be invalid?
Classical Mechanics provides an accurate description of motion under most conditions, but it begins to break down under particular conditions. Which of the following conditions would cause Classical Mechanics predictions to be invalid?
Flashcards
Classical Mechanics
Classical Mechanics
Branch of physics describing the motion of macroscopic objects.
Mass
Mass
A measure of an object's resistance to acceleration.
Force
Force
Interaction that can alter an object's motion.
Newton's First Law
Newton's First Law
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Work-Energy Theorem
Work-Energy Theorem
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Kinetic Energy
Kinetic Energy
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Potential Energy
Potential Energy
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Conservation of Energy
Conservation of Energy
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Newton's Law of Universal Gravitation
Newton's Law of Universal Gravitation
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Density
Density
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Study Notes
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