Answer
$1.89\times 10^4$
Work Step by Step
The total force on the spring is given as:
$F=k(\Delta y)$
$F=4.03\times 10^6(2.30)$
$F=9.27\times10^6N$
One person can exert a force $=490N$
Thus, the number of persons required to exert this force
$=\frac{9.27\times10^6}{490}=1.89\times 10^4$
