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Question
Which of the following are vector quantities?
i. The velocity of a frisbee
ii. The width of a crater made by an asteroid
iii. The speed of a car on the highway
iv. The displacement of a billiard ball after it is struck by the cue ball
Which of the following are vector quantities?
i. The velocity of a frisbee
ii. The width of a crater made by an asteroid
iii. The speed of a car on the highway
iv. The displacement of a billiard ball after it is struck by the cue ball
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Solution
The correct option is D i and iv
A vector quantity indicates that the number has a magnitude (size) and direction.
Using this knowledge it can be determined that:
i the velocity of a frisbee is a vector quantity because the velocity indicates magnitude and direction.
ii. the width of a crater made by an asteroid is not a vector quantity because the width does not indicate direction.
iii. the speed of a car on the highway is not a vector quantity because the speed of a car does not indicate direction.
iv. the displacement of a billiard ball after it is struck by the cue ball is a vector quantity because the displacement indicates magnitude and direction.
A vector quantity indicates that the number has a magnitude (size) and direction.
Using this knowledge it can be determined that:
i the velocity of a frisbee is a vector quantity because the velocity indicates magnitude and direction.
ii. the width of a crater made by an asteroid is not a vector quantity because the width does not indicate direction.
iii. the speed of a car on the highway is not a vector quantity because the speed of a car does not indicate direction.
iv. the displacement of a billiard ball after it is struck by the cue ball is a vector quantity because the displacement indicates magnitude and direction.
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