Question

Two quantities A and B have different dimensions. Which mathematical operation given below is physically meaningful? (a) A/B (b) A+B (c) A-B (d) none

Answer 1

Hey
(a) A /B. can be meaningful as we can write unit of velocity as m/sec.

But (b) and (c) are not as we cannot subtract or add to different quantities.

Hope it helps #))

Answer 2

Answer:

a) A/B

Explanation:

Quantity one = A (Given)

Quantity two = B (Given)

Mathematical operation which will be physically meaningful will be -

Quantities having different dimensions can only be divided or multiplied but they cannot be added or subtracted. Hence, the right answer is A/B. A /B. can be meaningful as we can write unit of velocity as m/sec.

Velocity is a measure of how fast something moves in a particular direction. In other words, a velocity is a speed with a direction. For example, if an object moves east at 7 metres per second we denote it as 7m/s, also we would say that its velocity is 9 m/s to the east.