Chapter2Test

1、判断题：
​A car speedometer measures its velocity.​
选项：
A: 正确
B: 错误
答案: 【 错误】

2、判断题：
‎If one object has a greater speed than a second object, the first necessarily have a greater acceleration.‍
选项：
A: 正确
B: 错误
答案: 【 错误】

3、判断题：
An object can have zero velocity and nonzero acceleration at the same time.​
选项：
A: 正确
B: 错误
答案: 【 正确】

4、判断题：
​An object can be increaseing in speed as its acceleration decreases.‎
选项：
A: 正确
B: 错误
答案: 【 正确】

5、判断题：
‍When an object moves with constant velocity, its average velocity during any time interval differs from its instantaneous velocity at any instant. ‏
选项：
A: 正确
B: 错误
答案: 【 错误】

Chapter2~3Test

1、单选题：
‎Which of the following formulas is true for all types of motion?​
选项：
A:
B:
C:
D:
答案: 【 】

2、单选题：
‌Which of the following ideas is helpful in understanding projectile motion?‌
选项：
A: Acceleration is +g when the object is rising and -g when falling.
B: The horizontal motion is independent of the vertical motion.
C: The velocity of the object is zero at the top point of parabola.
D: In the absence of friction, the trajectory will depend on the object’s mass as well as its initial velocity and launch angle.
答案: 【 The horizontal motion is independent of the vertical motion.】

3、单选题：

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