Answer:
4.24084 N
Explanation:
N = Speed of rotation = 1250 rpm
D = Diameter = 45 cm
r = Radius = [tex]\frac{d}{2}=\frac{45}{2}=22.5\ cm[/tex]
M = Mass of drop = 1.1 g
Angular speed of the water
[tex]\omega=\frac{2\pi N}{60}\\\Rightarrow \omega=\frac{2\pi 1250}{60}\\\Rightarrow \omega=130.89969\ rad/s[/tex]
Apparent weight is given by
[tex]W_a=M\omega^2 R\\\Rightarrow W_a=1.1\times 10^{-3}\times 130.89969^2\times 0.225\\\Rightarrow W_a=4.24084\ N[/tex]
The apparent weight of a 1.1 g drop of water is 4.24084 N
