B) They will hit the ground at the same time. - Suppose you drop a feather and a hammer on
the Moon from the same height at the same time. What will happen?
Aj The feather will hit the ground first.
B) They will hit the ground at the same time.
C) The hammer will hit the ground first.
D) They ...
B) They will hit the ground at the same time. - ✔✔Suppose you drop a feather and a hammer on
the Moon from the same height at the same time. What will happen?
Aj The feather will hit the ground first.
B) They will hit the ground at the same time.
C) The hammer will hit the ground first.
D) They will float in space because of the lack of gravity on the Moon.
e) both first and third quarters - ✔✔At which lunar phase(s) are tides least pronounced (eg,
the lowest high tides)?
A) first quarter
B) new moon
C) full moon
D) both new and full moons
E) both the first and third quarters
A) the sum total of all forces acting on the object - ✔✔Newton's second law states: sum of forces =
mass x acceleration. According to this, what property can you determine if you observe the acceleration
of an object with a known mass?
A) the sum total of all forces acting on the object
B) the value of a single force acting on the object
C) the current velocity of the object by the current location of the object
C) a spiral - ✔✔Which of the following shapes is not an allowed trajectory of an undisturbed
object around a star?
A) a hyperbola
B) a parabola
C) a spiral
, D) an ellipse
B) the average distance between the two objects - ✔✔Newton's version of Kepler's third law states:
p2 = 4л3/[G(M1+M2)]a3
In this equation, what does a represent?
A) the orbital period
B) the average distance between the two objects
C the masses of the two objects
D) the universal gravitational constant
A) The sum has not changed. - ✔✔As a comet passes by on its closest approach to the Sun, what can
we say about how the sum of its potential and kinetic energy has changed since it was at its maximum
distance?
A) The sum has not changed.
B) The sum has decreased
C) The sum has increased.
D) The sum is equal to the universal gravitational constant
D) The universal gravitational constant - ✔✔Newton's version of Kepler's third law states: p2
= 4л3/[G(M1+M2)]a3
In this equation, what does G represent?
A| the orbital period
B) the average distance between the two objects
C) the masses of the two objects
D) The universal gravitational constant
C) It always has the same total orbital energy. - ✔✔Consider the elliptical orbit of a comet around
the Sun. Where in its orbit does it have the largest amount of total orbital energy?
A) when it is farthest: from the Sun.
B) when it is closest to the Sun.
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