Work Done and Energy Transfers
Work Done and Energy Transfers
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WORK is DONE on an object when it is MOVED through a distance by a particular force.
The equation to calculate work done is:
where:
When work is done, ENERGY is transferred from one form to another.
For example, the chemical energy in muscles is converted into kinetic energy when a person PUSHES an object.
If work is done against frictional forces, the KINETIC energy is often transformed into THERMAL ENERGY, which can cause a RISE IN THE TEMPERATURE of the object involved.
For example, when a car BRAKES, the KINETIC ENERGY of the car, is converted into THERMAL ENERGY in the brake pads, which causes the temperature of the brake pads to INCREASE.
WORK is DONE on an object when it is MOVED through a distance by a particular force.
The equation to calculate work done is:
where:
When work is done, ENERGY is transferred from one form to another.
For example, the chemical energy in muscles is converted into kinetic energy when a person PUSHES an object.
If work is done against frictional forces, the KINETIC energy is often transformed into THERMAL ENERGY, which can cause a RISE IN THE TEMPERATURE of the object involved.
For example, when a car BRAKES, the KINETIC ENERGY of the car, is converted into THERMAL ENERGY in the brake pads, which causes the temperature of the brake pads to INCREASE.
