课程名称︰普通物理学甲上
课程性质︰资工系选修兼通识A7
课程教师︰傅昭铭
开课学院：电资学院
开课系所︰资工系
考试日期（年月日）︰2012/11/
考试时限（分钟）: 120 mins
是否需发放奖励金：是
（如未明确表示，则不予发放）
试题 :
Part1 (30%) Single Choice (30points, 1.5 points each)
1. The position of a nanoparticle as a function of time is
x(t) = t^2-t-6, where x is measured in meters, t is measured
in seconds and t>0. When is the speed of the nanoparticle zero?
(A) when t = 0.5 s (B) when t = 2s
(C) when t = 3 s (D) The speed of the nanoparticle is never zero.
2. An object moves from a point with coordinates x = 0.0 m, y = -1.0 m,
to a point with coordinates x = 5.0m, y = -13.0 m in a time interval
of 4.0 seconds. The magnitude of its average velocity is
(A) 6.2m/s (B) 5.0m/s (C) 7.3m/s (D) 3.3 m/s
3. Tennis ball A is dropped from a height of 15 m. Tennis ball B is
thrown horizontally from a height of 15 m with a horizontal velocity
of 25 m/s. Which tennis ball hits the ground first?
(A) ball A
(B) ball B
(C) They both hit at the same time.
(D) Neither ball hits the ground.
4. The two blocks in the figure have masses M1 and M2 such that M1<M2
and they lay on a level, frictionless surface. We can apply a horizontal
force F either from the left or from the right, as depicted in the figure.
The contact force between masses M1 and M2 is
(A) the same in either case.
(B) larger when F is applied from the left.
(C) larger when F is applied from the right.
(D) zero newtons.
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F