SMDEP Physics
Gravity, Simple Harmonic
Motion
• Vote only on required HW problems
• Other problems will be worked out
in TA sessions
Ch 14, #3: frequency?
2.3 Hz
8.3 Hz
1.2 Hz
0.3 Hz
Other
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Ch 14, #40: period on Mars?
1.3 s
2.2 s
0.5 s
32 s
Other
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1.
1.
2.
3.
4.
5.
6.
Suppose the Earth had no atmosphere and a ball were
fired from the top of Mount Everest tangent to the
ground. If the initial speed was large enough to cause
the ball to move in a circular trajectory around the
Earth, the ball’s acceleration would:
56%
44%
..
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2.
3.
Be much less than g
(because the ball doesn’t
fall to the ground)
Be approximately g
Depend on the ball’s
initial speed
B
1.
The Moon does not fall to Earth because:
11%
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..
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It
4.
5.
36%
ne
3.
52%
e
2.
The net force on it is
zero
It is beyond the main pull
of Earth’s gravity
It is being pulled by the
Sun and other planets as
well as Earth
All of the above
None of the above
Th
1.
An object moves along the x-axis subject to a
force described by the potential energy shown
below. About what point can the object
execute an oscillation?
A
B
C
All of the
33%above
None of the above
21%
17%
a.
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C
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U(x)
A
B
C
19%
10%
A
1.
2.
3.
4.
5.
x
A block hangs from a spring. The block is held
at a position where the spring is unstretched
and then released. What happens?
3.
4.
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2.
It remains at rest at the new
equilibrium position.
It oscillates about the
unstretched string position.
It oscillates about a position
that is lower than its initial
position.
It moves but not in simple
harmonic motion because the
net force is not proportional to
the displacement.
It
1.