1. A car initially at rest accelerates for 4 seconds to reach a final velocity of 20m/s. Determine the acceleration of the car.

show the work please. i’m confused. i’ll give u brainliest :)

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.