Universal Forces 52: Kvaluate Important Equations
Newton's Law of Universal Oravitation: -
KE 1/2my!
Coulomb's Low: - Ko -
PE-

1) Imagine it is possible to build a very tall tower on Earth's equator. The lower is 6 miles high,
It is higher than the tallest mountain, higher than planes fly. Now Imagine it is possible for a
person to stand at the top of this tower and drop a ball (Note: Assume the Earth is NOT
spinning...)
1a) Circle one of the answers below to show where you think the ball will go when it is
droppid
2. The ball will fall to the Earth alongside the lower
b. The ball will fall upward into space, away from Earth.
C. The ball will fall downward into space, away from Earth.
d. The ball will circle around the Earth.
Draw an arrow from the hand holding the ball to where you think the ball will travel,
Your arrow should show the path the ball takes after it is dropped. Explain your
thinking, What force causes the ball to drop the way your arrow shows?
1b) How would the force of gravity on the ball at the top of the lower change if the lower
were only 3 miles high (as compared to the original height of 6 miles)? Explain using the
approprláto mathematical formula,
10) How would the force on the ball change if the lower was located on the moon. The mos
of the moon is much smaller than the Earth? Explain using the appropriate mathematical
formula
1d) How are gravitational and electrical forces the same and how they different? USA
specific examples of similarities and differences, How do the differences affect the direction
of the force?
Question 2)

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

Question 1 what is amperage? is the rate of doing work. is the rate of flow of protons in electric current. represents the amount of pressure behind electron flow. is the rate of flow of electrons in electric current. 2 points question 2 what is voltage? is the rate of doing power. represents the amount of pressure behind electron flow. is the rate of doing work. is the rate of flow of electrons in electric current. 2 points question 3 what is power? is the rate of flow of protons in electric current. is the rate of flow of electrons in electric current. is the rate of doing work. represents the amount of pressure behind electron flow. 2 points question 4 if we multiply volts times amps we get what? power circuit work current 2 points question 5 what are two ways alternating currents are similiar? in both ac and dc electrons flow in the same pattern. in both ac and dc, the flow of electrons changes directions back and forth. both ac and dc are only possible in certain materials with atoms that will allow electron flow. both ac and dc involve the flow of electrons. 4 points question 6 how does the flow of electrons flow in an alternating current? the flow of electrons is always slower in an alternating current than within a direct current. the flow of electrons is not constant and forward; it changes direction back and forth. electrons flow from from a higher affinity to that of a lower affinity. electron flow is constant and only in a forward direction. 2 points question 7 what is the flow like in a direct current? the flow of electrons is not constant and forward; it changes direction back and forth. the flow of electrons is constant and only in a forward direction. the flow of electrons go from a higher affinity to a lower affinity. the flow of electrons are always faster in a direct current. 2 points question 8 how is an electric current able to flow? electrons flow from the higher affinity to lower affinity and electrical current is generated. protons flow from the higher affinity to lower affinity and electrical current is generated. the movement of protons from one atom to another leads to an electric charge. the movement of electrons from one atom to another atom in a line results in a flow of electric current. 2 points question 9 how do electrons move from the two different types of metal in a battery? protons flow from the metal with the lower affinity to the metal with higher affinity and electrical current is generated. electrons flow from the metal with the lower affinity to the metal with higher affinity and electrical current is generated. electrons flow from the metal with the higher affinity to the metal with lower affinity and electrical current is generated. protons flow from the metal with the higher affinity to the metal with lower affinity and electrical current is generated.

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm