Physics 2130 Final Exam Solutions
3
1.
B
The gure shows a car moving to the left, and slowing down.
Given the coordinate axes shown, the cars acceleration a could be
A) 2 m/s2 (x) B) 2 m/s2 (+) C) 2 m/s2 (y ) D) 2 m/s2 (+)
x
y
2. An elevator is moving upw
Name:
Section:
Physics 2130
Final Exam
May 2, 2012
Turn o your cell phone NOW, if you have one, and put it away. Please place your bags
and other unnecessary items on the ground. Be sure you are not sitting next to anyone else,
and are not sitting in one
Physics 2130 Exam 3 Solutions
3
1.
A
If I apply a 2 N force to stretch a spring with
spring constant k = 20 N/m, by how much does the spring
stretch?
A) 0.1 m B) 10 m C) 40 m
k=20N/m
2N
If I am holding the block steady with my hand using a force of 2 N, t
1. The gure shows a 2kg block and a
1kg block. Where is the center of mass?
A
B
C
D
2kg
E Quiz #8
1kg
2. A 10kg block moves at 10m/s to the right, and a 1kg block 10kg 10m/s
moves 1kg to the left. The center of mass of both blocks is
1m/s
A) moving to the
Quiz #10
1. Which pendulum has the larger frequency?
A) 1kg
B) 9kg
C) Both the same
y
2. This graph is the displacement of a(n) _ oscillator.
A) underdamped
B) overdamped C) forced
3. Given two sound waves in air, the one with higher frequency has
A) a lo
1. The change in momentum p of a ball is equal to the _ on it. Quiz #7
A) impulse acting
B) work done
C) weight placed
Two balls with the same mass and speed hit a wall. Ball A
sticks to the wall; ball B bounces off of it with the same speed.
2. Which one
Quiz #11
1. The gure shows a standing wave.
The arrow points to a
A) node B) antinode
2. Which shows the lowest-frequency standing wave in a
pipe which is open on the left and closed on the right?
A)
B)
C)
D)
3. If you move towards a speaker that is emitt
The gure shows two masses attached by a rigid rod, which is
spinning around the axis marked by the black dot.
1. Which ball has the larger speed v?
A
A) A
B) B
C) both the same
Quiz #9
2. Which ball has the larger angular speed ?
A) A
B) B
C) both the sam
Name:
Section:
Physics 2130
Exam 3
April 3, 2012
Turn o your cell phone NOW, if you have one, and put it away. Please place your bags
and other unnecessary items on the ground. Be sure you are not sitting next to anyone else,
and are not sitting in one o
1. The gure shows a 2kg block and a
1kg block. Where is the center of mass?
A
B
C
D
E Quiz #8
BCAABC
2kg
1kg
2. A 10kg block moves at 10m/s to the right, and a 1kg block 10kg 10m/s
moves 1kg to the left. The center of mass of both blocks is
1m/s
A) moving
The gure shows two masses attached by a rigid rod, which is
spinning around the axis marked by the black dot.
1. Which ball has the larger speed v?
A
A) A
B) B
C) both the same
Quiz #9
BCABBA
2. Which ball has the larger angular speed ?
A) A
B) B
C) both
1. The change in momentum p of a ball is equal to the _ on it. Quiz #7
A) impulse acting
B) work done
C) weight placed
ABBCCA
Two balls with the same mass and speed hit a wall. Ball A
sticks to the wall; ball B bounces off of it with the same speed.
2. Wh
Quiz #11
BDABBC
1. The gure shows a standing wave.
The arrow points to a
A) node B) antinode
2. Which shows the lowest-frequency standing wave in a
pipe which is open on the left and closed on the right?
A)
B)
C)
D)
3. If you move towards a speaker that i
Quiz #10
CABBBC
1. Which pendulum has the larger frequency?
A) 1kg
B) 9kg
C) Both the same
y
2. This graph is the displacement of a(n) _ oscillator.
A) underdamped
B) overdamped C) forced
3. Given two sound waves in air, the one with higher frequency has
F1
1. In this gure, if I apply a force F1 to the left
side of the uid, the right side feels force F2.
A) a greater
B) the same
C) a smaller
2. The density of water is 1000 kg/m3.
The oating object in the picture has a density of
A) 100 kg/m3
B) 500 kg/m3
F1
1. In this gure, if I apply a force F1 to the left
side of the uid, the right side feels force F2.
A) a greater
B) the same
C) a smaller
2. The density of water is 1000 kg/m3.
The oating object in the picture has a density of
A) 100 kg/m3
B) 500 kg/m3