(14)

Step 1:

The position function is .

Find the velocity at time .

Apply derivative on each side with respect to .

Apply power rule of derivatives  .

The velocity of the object at time is .

Solution:

The velocity of the object at time is .

(15)

Step 1:

The velocity of the object at time is .

If the object stops, then the velocity of the object is zero.

In this case the velocity of the object never becomes zero.

, for all values of .

Therefore, the object never stops moving.

Solution:

The object never stops moving.