# 2015年12月SAT2真题答案

2015-10-28 13:46 小马过河

为了帮助考生们更好的备考12月的SAT2各个科目，取得自己理想的成绩，今天小马过河的小编为各位考生准备的备考资料是2015年12月SAT2真题答案，希望对各位考生有帮助。

2015年12月SAT2真题答案

1. An object that’s moving with constant speed travels once around a circular path. True statements about this motion include which of the following?

I. The displacement is zero.

II. The average speed is zero.

III. The acceleration is zero.

A. I only

B. I and II only

C. I and III only

D. III only

E. II and III only

Explanation:

Traveling once around a circular path means that the final position coincides with the initial position. Therefore, the displacement is zero. The average speed, which is total distance traveled divided by elapsed time, cannot be zero. And since the velocity changed (because its direction changed), there was a nonzero acceleration. Therefore, only I is true.

2. A force F of strength 20 N acts on an object of mass 3 kg as it moves a distance of 4 m. If F is perpendicular to the 4 m displacement, the work it does is equal to

A. 0 J

B. 60 J

C. 80 J

D. 600 J

E. 2,400 J

Explanation:

Since the force F is perpendicular to the displacement, the work it does is zero.

关于2015年12月SAT2真题答案的内容就为各位考生介绍完毕了，有需要本资料的考生可以点击图片直接下载完整版的内容，在备考过程中有什么不明白的内容，可以咨询小马过河的在线老师。小马过河SAT频道在不断的更新中，请考生们持续关注。