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Unformatted text preview: _ Physics 1C .
Quiz # 1 Oct. 8, 2003 -
Prof. Jose Onuchic MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Introduction to questions 1 -3
A 2.5 kg block on a horizontal frictionless surface is attached to a spring whose force constant is 200 N / m. The block is
pulled from its equilibrium position at x = 0 m to a displacement x = +0.030 m and is released from rest. The block then executes simple harmonic motion along the x-axis (horizontal).
1) In the situation above. the displacement of the block at time t = 0.40 sis closest to: A) -0.05m B) -0.07m C) +0.07m D) -o.03 m E) +0.05 m A) -0.3 m/ s B) zero C) +0.5 m/s D) +0.3 m/ s E) -0.5 m/ s 3) In the situation above, when the displacement is x = 0.030 m. the kinetic energy of the block is closest to:
A) 0.61 I B) 0.53] C) 0.57] D) 0.55] E) 0.59 J D) the total energy oscillates at frequency f = 1 .5— 5) By what factor must one change the weight suspended vertically from a spring coil in order to triple its
period of simple harmonic motion? A) 1 / 9 B) 0.33 C) 3.0 D) 9.0 E) 6.0
6) Tnplmg the mass of the bob on a sunple pendulum wﬂl cause a change In the frequency of the pendulum
swing by what factor?
A) 0.33 B) 1.0 . C) 3.0 D) 9.0 E) 1.73 7) A mass of 0.40 kg, hanging from a spring with a spring constant of 80 N/ m. is set into an up and down
simple harmonic motion. What is the speed of the mass when moving through the equilibrium point? The starting displacement from equilibrium is 0.10 m.
A) zero B) 1.4 m/s C) 2.0 m/s D) 3.4 m/s E) 2.8 m/s A—l ofthemasswhent=33? -
A) zero B) 00065 m/ s C) 0015 m/s D) 0.024 m/s . _ E) 0.24 111/3 10) A simple pendulum has a period of 2.0 5. What is the pendulum length? (g = 9.8 m/ 52)
a. 0.36 m
b. 0.78 m
c. 0.99 m
d. 2.45 m A) 0.36 m B) 0.73 m C) 0.99 m D) 2.45 m E) 3.00 m A—2 ...
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