. A playful student throws a water balloon straight up in the air. It reaches a height of 20 meters before it comes crashing back down on the playful student.
How long was the balloon in the air? How fast was it moving when it hit the
student on the head?

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

Which best describes the weak nuclear force? it maintains attraction between the m ecules in liquids. it attracts the nucleus of one atom to the nucleus of another atom. it pulls all matter in the universe together it keeps particles that make up protons and neutrons together

How to know which equation of motion to use where?explain