An object is is moving at the right with speed vi when a force of magnitude F is exerted on it.  in which of the following situation is the object direct of emotion changing kinetic energy increasing at the instant shown?

The kinetic energy of the object is increasing when the force acts on the object as shown in option A.

Kinetic energy is the energy possessed by a body by virtue of its motion. Hence, a body that has kinetic energy must be in motion. Recall that the reason for motion is a force.

Now, for a force to increase the kinetic energy of the moving object, the force must act in the same direction. Therefore, the correct answer to the question ought to be the diagram shown in option A.

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the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

c)as speed changes, wavelength and frequency change.

everything changes!