PHYS130 Study Guide - Midterm Guide: Transverse Wave, International System Of Units, Situation Two
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1)
A 1.6-kg block on a horizontal frictionless surface is attached to a spring whose force constant is
190 N/m. The block is pulled from its equilibrium position at x = 0 m to a displacement
x = + 0.080 m and is released from rest. The block then executes simple harmonic motion along
the x-axis (horizontal). The velocity of the block at time t = 0.40 s is closest to:
A)
0.8 m/s
B)
-0.8 m/s
C)
0.3 m/s
D)
-0.3 m/s
E)
zero
1)
Situation 1
The angle with the vertical of a swinging simple pendulum obeys the equation
Θ(t) = (0.150 rad) cos[(2.85 rad/s) t + 1.66].
2)
In Situation 1, the mass of the swinging bob at the end of the pendulum is closest to:
A)
2.85 kg
B)
1.66 kg
C)
0.454 kg
D)
0.150 kg
E)
It cannot be determined from the information given.
2)
3)
What happens when a periodic driving force is applied to a vibrating system?
A)
The system will stop vibrating and finally come to a stop.
B)
The system will exhibit chaotic motion.
C)
The system will vibrate at the frequency of the driving force.
D)
The system will vibrate at its natural frequency.
E)
It will vibrate at some multiple of the driving frequency (called a harmonic or "overtone").
3)
Situation 2
A 5.0-kg block is attached to a spring whose force constant is 125 N/m. The block is pulled from its equilibrium position
at x = 0 m to a position at x = + 0.687 m and is released from rest. The block then executes damped oscillation along the
x-axis. The damping force is proportional to the velocity. When the block first returns to x = 0 m, its x-component of
velocity is -2.0 m/s and its x-component of acceleration is + 5.6 m/s2.
4)
In Situation 2, the damping coefficient b is closest to:
A)
14 kg/s2
B)
16 kg/s2
C)
18 kg/s2
D)
20 kg/s2
E)
22 kg/s2
4)
5)
A transverse wave is propagated in a string stretched along the x-axis. The equation of the wave,
in SI units, is given by: y
= 0.005 cos π(38t - 14x). The wave speed, including the sense of
direction along the x-axis, in SI units, is closest to:
A)
2.7
B)
-2.7
C)
0.37
D)
-0.37
E)
zero
5)
6)
A string, 80 cm long and having a mass of 61 g, is attached to a 660-Hz vibrator at one end. The
other end of the string is fixed and the string is kept under tension. The vibrator produces a
transverse wave in the string, whose amplitude is 5.0 mm, and that propagates with a velocity of
32 m/s. The energy of the wave is absorbed at the fixed end. In this situation, the tension in the
string, in SI units, is closest to:
A)
78
B)
75
C)
81
D)
84
E)
87
6)
1
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PHYS130 Full Course Notes
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Document Summary
Choose the one alternative that best completes the statement or answers the question. 1: a 1. 6-kg block on a horizontal frictionless surface is attached to a spring whose force constant is. The block is pulled from its equilibrium position at x = 0 m to a displacement x = + 0. 080 m and is released from rest. The block then executes simple harmonic motion along the x-axis (horizontal). The velocity of the block at time t = 0. 40 s is closest to: 0. 8 m/s, -0. 8 m/s, 0. 3 m/s, -0. 3 m/s, zero. The angle with the vertical of a swinging simple pendulum obeys the equation. (t) = (0. 150 rad) cos[(2. 85 rad/s) t + 1. 66]. A 5. 0-kg block is attached to a spring whose force constant is 125 n/m. The block is pulled from its equilibrium position at x = 0 m to a position at x = + 0. 687 m and is released from rest.
