Each of two vectors,

\overrightarrow { \mathrm { D } } _ { 1 }

and

\overrightarrow { \mathrm { D } } _ { 2 }

,lies along a coordinate axis in the xy plane.Each vector has its tail at the origin,and the dot product of the two vectors is

\overrightarrow { \mathrm { D } } _ { 1 } \cdot \overrightarrow { \mathrm { D } } _ { 2 } = - \left| \overrightarrow { \mathrm { D } } _ { 1 } \right| \left| \overrightarrow { \mathrm { D } } _ { 2 } \right|

.Which possibility is correct?
A)

\overrightarrow { \mathrm { D } } _ { 1 }

and

\overrightarrow { \mathrm { D } } _ { 2 }

both lie along the positive x axis.
B)

\overrightarrow { \mathrm { D } } _ { 1 }

lies along the positive x axis.

\overrightarrow { \mathrm { D } } _ { 2 }

lies along the negative x axis.
C)

\overrightarrow { \mathrm { D } } _ { 1 }

and

\overrightarrow { \mathrm { D } } _ { 2 }

both lie along the positive y axis.
D)

\overrightarrow { \mathrm { D } } _ { 1 }

lies along the negative x axis.

\overrightarrow { \mathrm { D } } _ { 2 }

lies along the negative y axis.
E)

\overrightarrow { \mathrm { D } } _ { 1 }

lies along the positive y axis.

\overrightarrow { \mathrm { D } } _ { 2 }

lies along the negative x axis.

A 12-Kg Block on a Horizontal Frictionless Surface Is Attached

Multiple Choice