Download 51) If Earth had twice its present mass, but the same radius

Chapter 13 - Gravitational Interactions Preliminary Assessment
Take Home 2
51) If Earth had twice its present mass, but the same radius, what would be the value of g?
52) About how many high tides are there normally each day on an typical ocean beach?
53) A woman who weighs 800 N at Earth’s surface stands on top of a very tall ladder so she is one Earth
radius above Earth’s surface. How much does she weigh?
54) If the radius of Earth were one half what it is now, and its mass were the same, what would be the
value of g?
55) How can you tell if a gravitational force exists in a region of space?
56) Does the earth, the moon, or the sun produce a greater tidal effect on you right now? Why?
57) Compared to the gravitational field on the surface of Earth, the gravitational field well below Earth’s
surface is
58) What is the primary cause of ocean tides?.
59) If the sun were to collapse to form a black hole (quite unlikely), what would happen to the earth?
60) Suppose the moon were covered with water and orbited Earth as it now does. In that case how many
tidal bulges would the moon have?
61) There are two main processes going on in the sun that keep the sun in existence and shining. What are
these processes?
62) What do gravitational field lines show?
63) Does the mass of the moon and earth affect the number of tidal bulges on Earth? Explain.
64) During an eclipse of the sun, when the moon comes between the sun and Earth, how are ocean tides
affected? Explain.
65) The force of gravity on you is greatest when you are standing where relative to the earth’s surface, on
the surface, just above, or just below? Explain.
66) What is a black hole? Why is it black?
67) What causes Earth tides, in which the solid surface of Earth rises and falls?
68) What is the factor most directly responsible for making a black hole invisible?
69) Suppose the moon had twice its present mass and still orbited Earth at the same distance. In that case
what would happen to ocean tides? Would the tidal bulge facing away from the moon get smaller?
70) If the mass of the earth increased, with no change in radius, what would happen to your weight?
71) What causes a lunar eclipse? Explain completely.
72) The value of the acceleration due to gravity, g, is dependent upon what variables?.
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Chapter 13 - Gravitational Interactions Preliminary Assessment
Take Home 2
73) What causes a solar eclipse? Explain completely.
74) When a star collapses to form a black hole, what happens to its mass?
75) What is the gravitational field strength at the center of the Earth?
76) Are tides more likely to occur on a large planet or a small planet? Why?
77) According to Newton’s laws, a rock and a pebble will fall with the same acceleration in a
gravitational field even though the gravitational force on each is different. Explain why this is possible.
78) If you were to weigh yourself in an elevator that is accelerating upward, would your weight be greater
or less than normal? Explain why.
79) Gravitation weakens as the inverse square of distance, while tidal gravity (force per kilogram)
weakens with the inverse
80) If you drop a stone into a hole drilled all the way to the other side of Earth, describe the motion of the
stone. Where will it be moving fastest?
81) If the radius of the earth decreased, with no change in mass, what would happen to your weight?
TRUE/FALSE. If true, mark “A”, If false, mark “B” on the Scantron
82) Which pulls harder on Earth’s oceans, the sun or the moon?
83) When the moon’s shadow falls on Earth, what kind of eclipse occurs?
84) When Earth’s shadow falls on the moon, what kind of eclipse occurs?
85) What defines a spring tide?
86) If the moon had oceans as deep as Earth’s, would tides on the moon be about the same height as
Earth’s tides?
87) What is the cause of ocean tides? Be complete in your explanation.
88) When the properties of space are altered in such a way that a mass in that space experiences a force,
what kind of field is present?
89) What variables determine the acceleration due to gravity?
90) Does a skydiver jumping from a plane in the direction of the Earth’s gravitational field, or in a
direction opposite that field?
91) What is it about the Earth that gives it a gravitational field?
92) What defines a neap tide?.
93) If Earth had its present mass but twice the radius, what would happen to the acceleration due to
gravity?
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