A 10 kg sled slides down a hill with an incline of 30 degrees above the horizontal. Because of friction, it maintains a constant speed. For every meter that is traveled, how much energy (in joules) does the sled lose?
I say 98 sin(30) Joules?
If you mean how much kinetic and potential energy, you only lose potential energy, and that loss equals M g sin 30, which is what you came up with.
To find the amount of energy the sled loses while sliding down the hill, we need to determine the work done by friction. The work-energy principle states that the work done on an object is equal to the change in its kinetic energy.
In this case, since the sled is moving at a constant speed, its kinetic energy is not changing, so the work done by friction is equal to zero. This means that the sled does not lose any energy due to friction as it slides down the hill.
Therefore, the correct answer is zero joules.