Experiment 201
EXPERIMENT 201:
WORK, ENERGY AND POWER
John Michael A. Ramos, Phy11l/A5
Abstract
The essential conditions to be satisfied for work to be done are: Some force must act on the object. The point of application of force must move in the direction of force. W = F x s. SI unit of work is joule. Energy is the capacity to do work. The two types of mechanical energy are kinetic energy and potential energy. Kinetic energy is the energy possessed by an object by virtue of its motion. Potential energy is the energy possessed by an object by virtue of its position or condition.
Kinetic energy = 1/2 mv2.
Potential energy = mgh.
Law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another. Power is the rate of doing work.
SI unit of power is watt.
Escape velocity is the minimum velocity with which a projectile is thrown into space in order that it escapes the gravitational pull of the earth and never returns to the surface of the earth.
Introduction In the physical world, the possession of energy by an object means that it has an ability to do work. Work done is a measure of the “effect” the application of a force produces. If the applied force and the displacement of the object are in the same direction, then the work done is given by,
Work Done = Force x Distance.
Mechanical energy has several different forms. Elastic Potential Energy is the stored energy by virtue of an object’s configuration. When you stretch a spring, you are doing work on the spring and in turn the spring stores that work in the form of elastic potential energy. Gravitational Potential Energy, on the other hand, is the stored energy by virtue of an object’s height (position). When the gravitational force is the only force on an object, the gravitational potential energy is calculated from,
Gravitational Potential Energy = Weight x Height.
Energy that exists by virtue of an object’s motion is called the Kinetic Energy. The
WORK, ENERGY AND POWER
John Michael A. Ramos, Phy11l/A5
Abstract
The essential conditions to be satisfied for work to be done are: Some force must act on the object. The point of application of force must move in the direction of force. W = F x s. SI unit of work is joule. Energy is the capacity to do work. The two types of mechanical energy are kinetic energy and potential energy. Kinetic energy is the energy possessed by an object by virtue of its motion. Potential energy is the energy possessed by an object by virtue of its position or condition.
Kinetic energy = 1/2 mv2.
Potential energy = mgh.
Law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another. Power is the rate of doing work.
SI unit of power is watt.
Escape velocity is the minimum velocity with which a projectile is thrown into space in order that it escapes the gravitational pull of the earth and never returns to the surface of the earth.
Introduction In the physical world, the possession of energy by an object means that it has an ability to do work. Work done is a measure of the “effect” the application of a force produces. If the applied force and the displacement of the object are in the same direction, then the work done is given by,
Work Done = Force x Distance.
Mechanical energy has several different forms. Elastic Potential Energy is the stored energy by virtue of an object’s configuration. When you stretch a spring, you are doing work on the spring and in turn the spring stores that work in the form of elastic potential energy. Gravitational Potential Energy, on the other hand, is the stored energy by virtue of an object’s height (position). When the gravitational force is the only force on an object, the gravitational potential energy is calculated from,
Gravitational Potential Energy = Weight x Height.
Energy that exists by virtue of an object’s motion is called the Kinetic Energy. The
References: URL: www.cstl-csm.semo.edu/coleman/OpSci.pdf http://www.tutorvista.com/content/physics/physics-i/work-energy-power.php