An arrow is launched vertically up with an initial velocity of 22 m/s . How long will it take the arrow to reach the highest point of it's flight?

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I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?