Physics Review QuestionUnit:
ElectricityYear:
1997 Question#:
1Question:
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 blocksWhat 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 |

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