1. a wooden dowel rod has a mass of 0.88 kg and a length of 1.2 m with an axis of rotation through the end.
2. a piece of cardboard has a length of 32 cm, a width of 22 cm and a mass of 92 g with an axis of rotation through the center.
3. a wooden hoop has a mass of 2.5 kg and a radius of 15 cm with an axis of rotation through the center.

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

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.