Motion in a Plane - Result Question 18
20. Which of the following is not a vector quantity?
[1995]
(a) speed
(b) velocity
(c) torque
(d) displacement
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Solution:
- (a) A vector quantity has both magnitude and direction. In the given options, speed has only magnitude, therefore, it is non-vector or scalar quantity.
If a physical quantity has magnitude and direction both, then it does not always imply that it is a vector. for it to be a vector, laws of vector algebra has to be satisfied.
