Asled is being pulled across a horizontal patch of snow. friction is negligible. the pulling force points in the same direction as the sled's displacement, which is along the +x axis. as a result, the kinetic energy of the sled increases by 47.9 percent. by what percentage would the sled's kinetic energy have increased if this force had pointed 68.6 ° above the +x axis?

17.47%

Explanation:

We can solve this problem through change in the Kinetic Energy,

Our Kinetic Energy at the beggining is,

After applying a force, the increase is given by

The change in the kinetic energy is given by

In this way, we know that the displacement of sled is,

When there is a positiving force of 68.6° we have in our Kinetic energy,

Substituting,

We can know define the % increased

c)as speed changes, wavelength and frequency change.

everything changes!