Question

what is the change in momentum of a car waiting 1800 kg when its speed increases from 36 kilometre per hour to 72 km per hour uniformly​

Answer 1

$\bf{\underline{\underline{Question}}}$

What is the change in momentum of a car waiting 1800 kg when its speed increases from 36 kilometre per hour to 72 km per hour uniformly.

$\bf{\underline{\underline{Solution}}}$

$\bf{Given,}$

$\bf{Mass,m\:=\:1800kg}$

$\bf{1) \:\:Initial\:Velocity,u\:=\:36km/h}$

$\bf{converting\:it\:into\:m/s}$

$\bf{u\:=\:\cancel{36}\times{\frac{5}{\cancel{18}}}}$

$\bf{\boxed{u\:=\:10m/s}}$

$\bf{2)\:\:Final\:Velocity,v\:=\:72km/h}$

$\bf{converting\:it\:into\:m/s}$

$\bf{v\:=\:\cancel{72}\times{\frac{5}{\cancel{18}}}}$

$\bf{\boxed{v\:=\:20m/s}}$

$\bf{Using\: formula\:,}$

$\bf{Change\: in\: momentum,}$

$\bf{P\:=\:mv\:-\:mu}$

$\bf{P\:=\:1800\times20\:-\:1800\times10}$

$\bf{P\:=\:36000-\:18000}$

$\bf{\boxed{P\:=\:18000\:kg\:m/s}}$

$\bf{\underline{\underline{Thanks}}}$

Answer 2

Answer:

your frree fire I'd pleaseeeewswwww