Question

A block weighing 10N is dropped from a height h=12cm above a spring balance with k= 1000N/m. What maximum weight will the balance read momentarily?

Answer 1

$$mg(h+x)=0.5kx^2\to \\10(0.12+x)=0.5(1000)x^2$$

$$x=0.06\ m$$

$$F=kx=(1000)(0.06)=60\ N$$