A vector is multiplied by scalar k. Is the magnitude of new vector ?
No, because magnitude of a vector is positive quantity.
If k is a negative scalar then k will be negative which is not possible.
The magnitude of new vector will be
Which of the following is true or false? Give examples:
(i) A scalar quantity can never take negative values.
(ii) It is necessary for a scalar quantity to be dimensionless.
(i) False, work is a scalar quantity and can have negative values.
(ii) False, work is a scalar quantity and have dimensions.
The dimensional formula of work is M1 L2 T-2]