Where does the energy go?Your body wastes energy, but it doesn't accomplish any work on the box. This is because your body is inefficient in metabolizing food and generating forces.
So where does the energy go?No. Consider gravity. Gravity acts upon a box sitting on the ground, applying a force that pulls it down. If we watch the box we will see that it does not move, there is no displacement. As such there is no work done on it. Also, no energy is expended by applying this force.
Now, this changes a little bit if you talk about using machines, such as your body, to apply a force. Your body is not a perfect machine and must expend energy to apply any force using its muscles. In such a case you would indeed use up calories, but this energy is used up in your body, and the work performed is on your body, not on the box.
What energy? If you mean the energy used by your body, it is turned into heat.So where does the energy go?
Potential energy was converted to kinetic energy. That process IS work.I'm still having trouble with work & energy.
Consider a ball that starts 1m above the ground and falls down to the ground without bouncing. All of the ball's gravitational energy is converted into kinetic energy, right? But we also know that work was done on the ball. So if all the energy is converted from gravitational energy to kinetic energy and there is no energy left to do work, then how has work been done?
Work is what was done as the potential energy was turned into kinetic energy. Work is force times distance. The distance was 1 meter, the force was mg where m is mass, g is the acceleration due to gravity, so the work done on the ball is 1 x mg.I'm still having trouble with work & energy.
Consider a ball that starts 1m above the ground and falls down to the ground without bouncing. All of the ball's gravitational energy is converted into kinetic energy, right? But we also know that work was done on the ball. So if all the energy is converted from gravitational energy to kinetic energy and there is no energy left to do work, then how has work been done?
Energy can also be transferred by heating. Just like work, heat is not energy, it is the amount of energy transferred by heating. If the force is constant, the work is the force times the change in position (or the displacement in position). For heat, if the temperature is constant, the heat energy transferred is the temperature times the change in entropy. It has the same form, and temperature is sometimes referred to as a "thermodynamic force" and the entropy as a "thermodynamic displacement".Is work the only process that energy can be transferred through? If so, then whenever energy is transferred, there will always be a force and displacement involved?