Help? I feel like it is either C or D but I could be absolutely wrong and I kind of need to pass this.

D. Frictionand air resistance

Explanation:

This problem can be understood using the principle of energy conservation which tells us that energy is transformed from one form to another. That is, it is transformed from kinetic energy to potential energy or vice versa.

If there are no friction forces or some kind of forces that are acting against the movement, it can be said that energy conservation is done 100%

But when this is not fulfilled, that is, when there is a force that prevents movement or acts in the opposite direction to displacement or work done, this physical expression is given

This equation tells us that the kinetic energy at the beginning will be equal to the kinetic energy at the end, as long as there is no work ( W1-2) in the opposite direction to the movement.

For this example this type of negative work is given by forces such as wind and women's weight.

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

compass can be used day and night, cloudy or sunny