if we model a blade as a point mass at the midpoint of the blade, what is the inward force necessary to provide each blades centripetal acceleration

reserve is the answer

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.