Question

using hooke's law F spring = k Δ x find the force needed to stretch a spring 2 cm if it has elastic constant of 3 N/cm. A. 2/3 N B. 3/2 N C. 6 N D. 3 N

Answer 1

Data:
Hooke represented mathematically his theory with the equation:
 
F = K * x
 
On what:
F (elastic force) = ?
K (elastic constant) = 3 N/cm
x (deformation or elongation of the elastic medium) = 2cm

Solving:

$F = K * x$
$F = 3 \frac{N}{\diagup\!\!\!\!\!\!cm} * 2\diagup\!\!\!\!\!\!cm$
$\boxed{\boxed{F = 6N}}$

Answer:
C. 6 N