BBC - GCSE Bitesize: Work, force and distance
explaining work, energy and power. The force is equal to the weight of the object, and the distance is equal to the height of the shelf (W= Fxd). Work-Energy Heat Energy -- a form of energy that is transferred by a difference in temperature. When forces and accelerations are used, you usually freeze the There is a strong connection between work and energy, in a sense that when. Force If you're a taking classical physics, simply stated, a force is a push or a pull (So you can see there is an intimate relationship between work and energy).
If the force is in the same direction as the displacement, then the angle is 0 degrees. If the force is in the opposite direction as the displacement, then the angle is degrees. If the force is up and the displacement is to the right, then the angle is 90 degrees.
- Work, force and distance
- Work, Power, and Energy
- Explain how force, energy and work are related?
This is summarized in the graphic below. Power Power is defined as the rate at which work is done upon an object. Like all rate quantities, power is a time-based quantity.
Power is related to how fast a job is done. Two identical jobs or tasks can be done at different rates - one slowly or and one rapidly. The work is the same in each case since they are identical jobs but the power is different.
The equation for power shows the importance of time: Special attention should be taken so as not to confuse the unit Watt, abbreviated W, with the quantity work, also abbreviated by the letter W. Combining the equations for power and work can lead to a second equation for power.Power - Work and energy - Physics - Khan Academy
A few of the problems in this set of problems will utilize this derived equation for power. Mechanical, Kinetic and Potential Energies There are two forms of mechanical energy - potential energy and kinetic energy. Potential energy is the stored energy of position.
Work, Power, and Energy - Wikiversity
In this set of problems, we will be most concerned with the stored energy due to the vertical position of an object within Earth's gravitational field.
Kinetic energy is defined as the energy possessed by an object due to its motion. An object must be moving to possess kinetic energy. The amount of kinetic energy KE possessed by a moving object is dependent upon mass and speed.
Mechanics: Work, Energy and Power
The total mechanical energy possessed by an object is the sum of its kinetic and potential energies. Work-Energy Connection There is a relationship between work and total mechanical energy.
The final amount of total mechanical energy TMEf possessed by the system is equivalent to the initial amount of energy TMEi plus the work done by these non-conservative forces Wnc.
The mechanical energy possessed by a system is the sum of the kinetic energy and the potential energy. Positive work is done on a system when the force doing the work acts in the direction of the motion of the object. Negative work is done when the force doing the work opposes the motion of the object.
When a positive value for work is substituted into the work-energy equation above, the final amount of energy will be greater than the initial amount of energy; the system is said to have gained mechanical energy. When a negative value for work is substituted into the work-energy equation above, the final amount of energy will be less than the initial amount of energy; the system is said to have lost mechanical energy.
Work, Energy, and Power
Electrons can flow out of a battery or capacitor and do work on another electrical component such as a light bulb. Although massless, a photon does have energy; in the amount hf where f is the photon's frequency and h is Planck's constant.
This is the energy that warms your face in the morning sun and burns your unguarded nose at the beach.
When some kinds of molecules are combined with others, energy can be released, usually as heat, light, or motion. When coal is burned it releases photon energy stored by plants millions of years before. When hydrogen combines with oxygen to form water, heat is released as well. A fire is oxygen combining with other substances; this also produces heat.
Mixing mentos and coke produces foam whose mechanical properties can be exploited as in a MythBuster's Christmas machine. One stick of dynamite produces about a Megajoule. When an atom fissions it releases various particles and a little bit of heat.
This energy was stored when the atom was created in the depths of a nova, an exploding star. Although the heat from each fission is miniscule, when the released particles trigger a cascade of fissioning atoms, the total energy can be enormous; as evidenced by the destruction wrought by an atomic weapon.