When the displacement of a mass on a spring is 12 A, what percentage of the energy is kinetic energy? At what displacement, as a fraction of A, is the energy half kinetic and half potential?

75%

Explanation:

x = Displacement of spring =

k = Spring constant

Total energy of the spring is

Elastic potential energy is given by

Total energy is given by

The percentage will be

The required percentage is 75%

According to the given condition

So, the energy is half when displacement is

found in the nucleus

has mass of one amu

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2