Q1.1
What are the x–
and y–components
of" the vector
!E?
A. Ex = E cos !, Ey = E sin !
B. Ex = E sin !, Ey = E cos !
C. Ex = –E cos !, Ey = –E sin !
D. Ex = –E sin !, Ey = –E cos !
E. Ex = –E cos !, Ey = E sin ! Q1.2
Consider the
vectors shown.
Which is a correct
statement
about
! !
A+ B?
A. x–component > 0, y–component > 0
B. x–component > 0, y–component < 0
C. x–component < 0, y–component > 0
D. x–component < 0, y–component < 0
E. x–component = 0, y–component > 0 Q1.7
Consider the vectors
shown.
What
! ! is the dot product
C • D?
A. (120 m2 ) cos 78.0°
B. (120 m2 ) sin 78.0°
C. (120 m2 ) cos 62.0°
D. (120 m2 ) sin 62.0°
E. none of these Q1.9
Consider the two vectors
!
A = 3iˆ + 4 ˆj
!
B = !8iˆ + 6 ˆj
! !
What is the dot product A " B ?
A. zero
B. 14
C. 48
D. 50
E. none of these