2020 普通物理Ⅰ(大连理工大学) 最新满分章节测试答案

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-02-24到2020-06-12
本篇答案更新状态:已完结

Chapter 2 Motion along a straight line Test 1 （for DUT-UCI JP）

1、 问题: Which of the following is a scalar quantity:
选项：
A:speed
B:time
C:length
D:instantaneous acceleration
E:instantaneous velocity
F:average velocity
G:average acceleration
H:magnitude of position vector
I:none of the above
答案: 【speed;
time;
length ;
magnitude of position vector】

2、 问题:In right handed coordinate system which axis is considered to be positive?
选项：
A:The thumb is z-axis, fingers curled from y-axis to x-axis
B:The thumb is x-axis, fingers curled from z-axis to y-axis
C:The thumb is y-axis, fingers curled from x-axis to z-axis
D: The thumb is z-axis, fingers curled from x-axis to y-axis
E:The thumb is x-axis, fingers curled from y-axis to z-axis
F:The thumb is y-axis, fingers curled from z-axis to x-axis
G:none of the above
答案: 【 The thumb is z-axis, fingers curled from x-axis to y-axis;
The thumb is x-axis, fingers curled from y-axis to z-axis;
The thumb is y-axis, fingers curled from z-axis to x-axis】

3、 问题:What is the magnitude of the Cartesian vector having the x, y and z axis components to be A, B and C?
选项：
A:Square root of the squares each A, B and C
B:Square of the squares each A, B and C
C:Cube root of the squares each A, B and C
D:Cube of the squares each A, B and C
E:none of the above
答案: 【Square root of the squares each A, B and C】

4、 问题:A physics professor leaves her house and walks along the sidewalk toward campus. After 5 min it starts to rain and she returns home. Her distance from her house as a function of time is shown in Fig. At Point ___( fill in the labeled points I/ II/ III/ IV/ V) is her velocity zero.
选项：
A:IV
B:I
C:II
D:III
E:V
答案: 【IV】

5、 问题:A physics professor leaves her house and walks along the sidewalk toward campus. After 5 min it starts to rain and she returns home. Her distance from her house as a function of time is shown in Fig. At Point ___( fill in the labeled points I/ II/ III/ IV/ V) is her velocity increasing in magnitude.
选项：
A:II
B:I
C:III
D:IV
E:V
答案: 【II】

6、 问题:The figure shows a position-versus-time graph of the motion of a car. Describe the velocity and acceleration during segments OA, AB, and BC. Which item is Not correct?
选项：
A:In segment OA, the velocity is positive and constant.
B:In segment OA, there is no acceleration.
C:In segment AB, the velocity is increasing.
D:In segment AB, there must be acceleration.
E:In segment BC, the velocity is not constant.
F:In segment BC, this velocity is greater in magnitude than the velocity in segment OA.
答案: 【In segment BC, the velocity is not constant. 】

7、 问题:A speeder traveling at a constant speed of 100 km/hr passes a waiting police car that immediately starts from rest and accelerates at a constant 2.5 m/s^2 How long will it take for the police car to catch the speeder?
选项：
A: 22.2 s
B: 23.3 s
C: 24.8 s
D: 21.4 s
E:25
F:20
答案: 【 22.2 s】

8、 问题:A speeder traveling at a constant speed of 100 km/hr passes a waiting police car that immediately starts from rest and accelerates at a constant 2.5 m/s^2. How fast will the police car be traveling when it catches the speeder?
选项：
A: 200 km/hr
B: 210 km/hr
C: 220 km/hr
D: 190 km/hr
E:180 km/hr
F:230 km/hr
答案: 【 200 km/hr】

9、 问题:The acceleration of a bus is given by a(t) =α*t, where α = 1.2 m/s^3. If the bus’s velocity at time t = 1.0s is 5.0 m/s, what is its velocity at time t = 2.0 s?
选项：
A:6.8 m/s
B:5.6 m/s
C:4.5 m/s
D:7.6 m/s
E:8 m/s
F:5 m/s
答案: 【6.8 m/s】

10、 问题:The acceleration of a bus is given by a(t) =α*t, where α = 1.2 m/s^3. If the bus’s position at time t = 1.0 s is 6.0 m, what is its position at time t = 2.0 s?
选项：
A:11.8 m
B:9.5 m
C:10 m
D:12.7 m
E:13.2 m
F:14.1 m
答案: 【11.8 m】

Chapter 3 Motion in two or three dimensions Test1（For International Class）

1、 问题: Which of the following is a vector quantity:
选项：
A:Speed
B:time
C:acceleration
D:mass
答案: 【acceleration】

2、 问题:In right handed coordinate system which axis is considered to be positive?
选项：
A:The thumb is z-axis, fingers curled from y-axis to x-axis
B:The thumb is x-axis, fingers curled from z-axis to y-axis
C:The thumb is y-axis, fingers curled from x-axis to z-axis
D: The thumb is z-axis, fingers curled from x-axis to y-axis
答案: 【 The thumb is z-axis, fingers curled from x-axis to y-axis】

3、 问题:What is the magnitude of the Cartesian vector having the x, y and z axis components to be A, B and C?
选项：
A:Square root of the squares each A, B and C
B:Square of the squares each A, B and C
C:Cube root of the squares each A, B and C
D:Cube of the squares each A, B and C
答案: 【Square root of the squares each A, B and C】

4、 问题:The radial component of velocity for a particle moving in a circular path is____
选项：
A:A non-zero constant
B:Radius itself
C:Variable
D:Zero
答案: 【Zero】

5、 问题:When acceleration is _, a velocity of a particle is constant.
选项：
A:Constant but non zero
B:Maximum
C:Zero
D:None of these choices
答案: 【Zero】

6、 问题:A physics professor leaves her house and walks along the sidewalk toward campus. After 5 min it starts to rain and she returns home. Her distance from her house as a function of time is shown in Fig. At Point ___( fill in the labeled points I/ II/ III/ IV/ V) is her velocity zero.
答案: 【IV】

7、 问题: A physics professor leaves her house and walks along the sidewalk toward campus. After 5 min it starts to rain and she returns home. Her distance from her house as a function of time is shown in Fig. At Point ___( fill in the labeled points I/ II/ III/ IV/ V) is her velocity increasing in magnitude.
答案: 【II】

8、 问题:
答案: 【3】

9、 问题:A model of a helicopter rotor has four blades, each 3.40 m long from the central shaft to the blade tip. The model is rotated in a wind tunnel at 550 rev/min. The linear speed of the blade tip is __m/s. （Take the whole number part）
答案: 【196】

10、 问题:
答案: 【2.23】

【作业】Chapter 3 Motion in two or three dimensions Homework Set1（For International Class）

1、 问题:Please see attached file.
评分规则: 【 Requirement: 1. Language in English. 2. Necessary analysis, equation or formular. 3. Necessary deducing process. 4. Correct result.
】

【作业】Chapter 2 Motion along a straight line Homework set 1 (for DUT-UCI JP )

1、 问题:Please see the attachment
评分规则: 【 Requirement: 1. Language in English. 2. Necessary analysis, equation or formular. 3. Necessary deducing process. 4. Correct result.
】

【作业】Chapter 3 Motion in two or three dimensions Homework Set 2 (for DUT-UCI JP )

1、 问题:Please see attached file.
评分规则: 【 Requirement: 1. Language in English. 2. Necessary analysis, equation or formular. 3. Necessary deducing process. 4. Correct result.
】

【作业】Chapter 6 Work and kinetic energy Homework Set2 (For international class)