Question

A skier is gliding down a slope at a constant speed. what energy transformation is taking place?

Answer 1

In this process, gravitational potential energy is converting into heat/thermal energy.

In fact, the skier starts at a certain height h, so it has gravitational potential energy equal to
$U=mgh$
as he slides down, he loses this energy. However, the problem says that the speed of the skier remains constant during the motion, so this energy is not converting into kinetic energy, which remains constant. The only possibility is that a frictional force between the skier and the ice is acting on the skier. When the friction acts, the energy of the skier is converted into motion of the molecules of the ice, heating it, so into thermal energy.

Answer 2

When the skier is gliding down a slope at a constant speed the Potential energy is transformed into heat energy.

What will be the energy transformation of a skier sliding at constant speed?

We know that energy can not be created nor be destroyed but only can transfer from one form to another.

A skier is gliding down a slope at a constant speed the gravitational potential energy due to height is converting into heat because of the frictional force.

Since the skier is making a constant speed so the Potential energy will not convert into kinetic energy.

So due to the friction between the ice and the skier the energy converts in the form of heat and dissipated to the ice

Thus when the skier is gliding down a slope at a constant speed the Potential energy is transformed into heat energy.

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