Exhibit 4-2
Newton approximated motion in a circle as a series of linear motions,as in the polygon below. Assume that the particle moves at constant speed v A from A to B,and at constant speed v B from B to C.
Use this exhibit to answer the following question .
-Refer to Exhibit 4-2.The direction of the change in velocity, $$\Delta \vec { v }$$ ,at point B,is shown by the arrow in
A) $\overleftarrow{}$
D) ↖
E) ↗

Question

Exhibit 4-2
Newton approximated motion in a circle as a series of linear motions,as in the polygon below.  Assume that the particle moves at constant speed v A from A to B,and at constant speed v B from B to C.
Use this exhibit to answer the following question .
-Refer to Exhibit 4-2.The direction of the change in velocity, $$\Delta \vec { v }$$ ,at point B,is shown by the arrow in
A) $\overleftarrow{}$ 
D) &#8598; 
E) &#8599;

Quizplus · Accepted Answer

The direction of the velocity change at point B is perpendicular to the direction of the velocity vector at point B. The velocity vector at point B is in the direction of line segment AB, which is horizontal. Therefore, the direction of the velocity change must be vertical and pointing downwards, as shown in choice C.

Exhibit 4-2 Newton Approximated Motion in a Circle as a Series

Exhibit 4-2
Newton Approximated Motion in a Circle as a Series