Unit: Electricity
Year: 1997 Question#: 1
Question: What is the total displacement of a student who walks 3 blocks east, 2 blocks north, 1 block west, and then 2 blocks south?
(1 ) 0
(2 ) 2 blocks east
(3 ) 2 blocks west
(4 ) 8 blocks
What is this question really asking?
Explanation by: Eric D
[ Return to question menu ]
Answer 1
0
INCORRECT
You probadly mixed up the number, guessed or put in 3 instead of 1 block west. Remember, North and South motions work against each other and East and West motions work against each other. return to top
Answer 2
2 blocks east
CORRECT
when you draw it out or cancel opposing directions the answer is 2 blocks east.
return to top Answer 3
2 blocks west
INCORRECT
you probably switched the east and west . You have the right number just wrong
direction. return to top
Answer 4
8 blocks
INCORRECT
You just added up the numbers , this would be right for distance but not displacement. Remember, displacement is a vector. return to top
What's this question really asking?
Do you know what displacement is and how to calculate it? return to top
