Q. Human heart is pumping blood with constant velocity $v\ m\ s^{- 1}$ at the rate of $M\ kg\ s^{- 1}$. The force required for this is $($in $N)$
A) $M$
B) $Mv$
C) $\frac{M}{v}$
D) $v\frac{dM}{dt}$
Explanation
(b) Force, $F = (M\ kg\ s^{- 1})(v\ m\ s^{- 1})$
$= Mv\ kg\ m\ s^{- 2} = Mv\ N$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.