Answer:
K = 3.1 8 × 10⁴ Nm
Explanation:
Given:
m = 68 Kg
x= 2.1 × 10 ⁻² m (in (2.1×10−2 mm) i think m is repeated just like kgkg in the start of question)
g=9.81 m/s²
K= ?
According to Hooke's Law
F = K x
also F=mg
⇒ mg = Kx
⇒ K = mg/x
K= 68 Kg × 9.81 m/s² / 2.1 × 10 ⁻² m
K = 3.1 8 × 10⁴ Nm