News The Project Technology RoboSpatium Contribute Subject index Download Responses Games Shopping tips Contact <<< Experiments in a wind tunnel Torque >>> Work, energy and powerWorkMechanical work is done whenever a force is moving an object trough a distance: Where is:W - work, F - force pointing along distance, s - distance EnergyWork is transforming energy into another form. There are two types of mechanical energy:1.) Potential energy: Where is: EPot - Potential energy, m - mass of the lifted object, g - gravitational acceleration, h - height difference 2.) Kinetic energy: Where is: EKin - kinetic energy, m - mass of the object, v - speed Strictly speakingone object doesn't attract another one, but rather the force between the objects affects both of them. Looking at a car and the earth, you will find out that the mass and therewith their gravitational fields differ significantly. The mass of the earth is aboutAs mentioned at the chapter about velocities and subsequently, movement is relative. Strictly speaking you push the earth away while accelerating your car, but the enormous mass difference permits to neglect the earth's change of movement. PowerPower is the rate at which work is performed or energy is converted: Where is:P - power, ΔW - work interval, Δt - time interval, ΔE - energy interval <<< Experiments in a wind tunnel Torque >>> News The Project Technology RoboSpatium Contribute Subject index Archives Download Responses Games Links Shopping tips Contact Imprint |
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