Physics I, PHY111 Lab Manual, version 1.5 TURN THS PAGE IN Questions about work,
ID: 1865633 • Letter: P
Question
Physics I, PHY111 Lab Manual, version 1.5 TURN THS PAGE IN Questions about work, energy and power: page 43 1. Please define each physical quantity: a. Energy b. Work: c. Power 2. Consider conservation of energy in the situation of the person climbing the stairs. Energy cannot be created or destroyed. So, what forms of energy are important at each of the following stages of the stair climb in order to understand the conservation of energy in this particular situation? a. When the student is at rest before climbing: b. When the student is in the process of climbing c. After the student has reached the top and come to a stop: Student Power Output 6 pages in this labExplanation / Answer
1.
a) Energy : Energy is defined as the capacity of doing work. Energy has forms as potential, kinetic, thermal, chemical, electrical, nuclear or some other forms. It has unit joule(J).
b) Work: Work is the product of force and displacement. Work transfers energy from one place to another. It has unit joule(J).
c) Power: Power is the rate of amount of energy transferred per unit time. Power is directionless quantity. It has unit watt(W).