Question

Your English teacher runs 0.80 km north and 1.20 km west. What is the magnitude of the resultant vector of this position?

A. 2.00 km
B. 1.44 km
C. 0.4 km
D. 0.89 km

Answer 1

Answer: B

`{ \rm{resultant = \sqrt{ {d _(1) }^(2) + {d _(2)}^(2) } }}`

• d1 is 0.80 km
• d2 is 1.20 km

`{ \rm{resultant = \sqrt{ {(0.80)}^(2) + {(1.20)}^(2) } }} \\ = { \rm{ √(2.80) }} \\ { \boxed{ \mathfrak{ \: \: answer = { \rm{1.44 \: km}}}}}`