45. Think & Calculate Two bumper cars move in a straight line with the following equations of motion:
What is th
a-
x = -4.0 m + (1.5 m/s)t
x2 = 8.8 m + (-2.5 m/s)t
(a) Which bumper car is has the greater speed?
(b) At what time do the bumper cars collide?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

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.

Write down two additional questions about earth's magnetic field that will make your presentation more informative.