Question

name the physical quantity which is expressed as the dot product of force and velocity .is it scalar or a vector quantity

Answer 1

◆#Answer#◆

~force(N)×velocity(m/s)

~power(Nm/s)

-_-●it is scalar quantity●

Answer 2

The product of force(N) and velocity (m/s) can be simplified as

$n \times \frac{m}{s} = \frac{nm}{s}$

(The n is supposed to be capital, cannot make it capital in mathematical text)

But, we know that Nm is Work which is product of Force and displacement caused by force

$\frac{w}{t}$

And work divided by time or rate of work is the same as power, so therefore the product of force and velocity is Power(P).

Power is a Scalar quantity as neither work nor time are vectors