An early major objection to the idea that the earth rotates on its axis was that it would have to turn so fast that people would be thrown off into space. Show the error in this logic by

calculating:

a. the speed of a 100 kg person standing at the equator. (The radius of the earth is

about 6400 km).

b. the net force necessary to keep the person in this motion.

c. how the normal force acting on the person compares to their weight.

d. From your answers to these questions, explain why people do not fly off into

space. What would happen to the size of the normal force if the earth spun faster?

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you