How long does it take for a bicycle traveling 7.0 m/s to come to a stop if the brakes provide an acceleration of -3.5 m/s2
A. 7.0 S
B. 10.5 s
O C. 3.5 s
D. 2.0 s

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.