<span>Velocity is a vector and it has both speed and direction. It takes a force to change direction just as it does to change speed</span>. In order to have a constant velocity the object must maintain a constant direction and speed. Hope this answers the questions. Have a nice day.
Answer: false
Explanation: the longer the period, the less thef= frequency
Answer:

Explanation:
Knowing that the formula for average velocity is:

Being said that, we know that the person's displacement is zero because it returns to its starting point

That means 

The answer is the last choice.
Its electrical potential energy stays the same because it has the same electric potential. The reason why is that moving the charge towards X does not change the distance of the negative charge between the plates. The Electrical potential energy of a particle is the result energy by virtue of its position from the electrical fields produce by the plates both positive and negative. Since the charge is still equidistant to each other (assuming based from the diagram) no change in terms of electrical energy consumption or work was done.
Newton's first law of motion. An object in motion tends to stay in motion. Since there is no friction in space to slow it down it just keeps going