Work: As Change in Energy
Über den Vortrag
Der Vortrag „Work: As Change in Energy“ von Jared Rovny, PhD ist Bestandteil des Kurses „Vorphysikum Zahnmedizin“.
Quiz zum Vortrag
Which statement is TRUE about throwing an object upward in the air?
- It loses kinetic energy. Gravity does negative work.
- It loses kinetic energy. Gravity does positive work.
- It gains kinetic energy. Gravity does negative work.
- It gains kinetic energy. Gravity does positive work.
- Its kinetic energy remains unchanged because energy is conserved.
You throw an object in the air, and it stops moving at its apex. What has happened to its initial kinetic energy?
- It converts by work of gravitational force into gravitational potential energy.
- It converts into work according to the work-energy theorem.
- Due to the conservation of energy, it is unchanged.
- It converts into the heat of the air molecules around it.
- It has changed the direction of its initial kinetic energy using work.
Which statement is an accurate description of the work-energy theorem?
- The total work done on an object is equal to its change in kinetic energy.
- The total work done on an object will equal its change in total energy.
- The work of a force exerted on an object is equal to the change in its kinetic energy even if there are other forces.
- The work done in a particular direction is equal to the change in the energy in that direction.
- The work done on an object equals the potential energy it loses.
An object with mass m falls from height h. What is its kinetic energy before hitting the ground?
- K = mgh
- K = 2mgh
- K = mgh/2
- K = gh
- K = -mgh
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Dozent des Vortrages Work: As Change in Energy
Jared Rovny, PhD
Dr. Jared Rovny has been a Lecturer at Yale University in Connecticut, USA since 2013.
He obtained his PhD in Physics from Yale University in 2019. He was awarded the D. Allan Bromley Graduate Fellowship in Physics in 2019 and the Princeton Quantum Institute Postdoctoral Fellow in 2020.
Currently, he works with Yale's Center for Teaching and Learning at Yale University.
Due to his achievements, he earned the Yale College Prize Teaching Fellowship for his work in PHYS 171 (University Physics for the Life Sciences).
Within Lecturio, Dr. Rovny teaches courses on Physics.
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every concept is made very simple and as short as possible
