Which of the following statements about velocity and/or speed are always TRUE? (

Question

Which of the following statements about velocity and/or speed are always TRUE?
(1) Velocity is a vector quantity and speed is a scalar quantity.

(2) The average velocity of an object on a round-trip journey would be 0.

(3) Person X moves from location A to location B in 5 seconds. Person Y moves between the same two locations in 10 seconds. The speed of person X is twice that of person Y.

(4) Person X moves from location A to location B in 5 seconds. Person Y moves between the same two locations in 10 seconds. The velocity of person X is twice that of person Y.

a.
Only statements 1 and 2 are true.
b.
Only statements 2 and 3 are true.
c.
Only statement 1 is true.
d.
All statements are true.
e.
Only statements 1, 2, and 4 are true.

Explanation / Answer

1) Velocity is a vector quantity and speed is a scalar quantity.-TRUE

2) The average velocity of an object on a round-trip journey would be 0.-TRUE

3) Person X moves from location A to location B in 5 seconds. Person Y moves between the same two locations in 10 seconds. The speed of person X is twice that of person Y.-FALSE

[Person Y has one-half the speed of Person X. If person Y requires twice the time to do the same distance, then person Y is moving half as fast.]

4) Person X moves from location A to location B in 5 seconds. Person Y moves between the same two locations in 10 seconds. The velocity of person X is twice that of person Y..-FALSE

ANSWER- a.
Only statements 1 and 2 are true.

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