Q1 The starting conditions of an oscillator are characterized by a) the frequenc
ID: 2271462 • Letter: Q
Question
Q1
The starting conditions of an oscillator are characterized by
a) the frequency
b) the initial acceleration
c) the phase angle
d) the phase constant
Q2
Q3
Q4
An object moves with simple harmonic motion. If the amplitude and the period are both doubled, the object's maximum speed is
a) quadrupled
b) unchanged
c) quartered
d) halved
e) doubled
Q5
Q8
A block (0.2 kg) attached to a horizontal spring is pulled 20 cm and released. Which statement is NOT true about the energy in the system just BEFORE the block is released?
Q10:
As a pendulum swings through its cycle, at the bottom of the swing the mass is ...
a) moving its fastest and has its least (or zero) acceleration.
b) moving its slowest and has its greatest acceleration.
c) moving its slowest and has its least (or zero) acceleration.
d) moving its fastest and has its greatest acceleration.
An object undergoing simple harmonic motion has its maximum speed when (hint: see Fig. 13-11) the object is at its maximum amplitude (x = A) the object passes through x = 0 you cannot determine without knowing the initial phase constant of the object the object is at 1/2 its amplitude (x = A/2) Figure 13-11 Position (blue) and velocity (red) plots for a harmonic oscillator with A = 1.0 m, phi = 0 rad. and omega = 2.0 rad/s. An object undergoing simple harmonic motion has its maximum positive acceleration when (hint: see Fig. 13-12) the object is at its maximum positive displacement (x = A) the object is at its maximum negative displacement (x = -A) when the object passes through x = 0 you cannot determine without knowing the initial phase constant of the object Figure 13-12 Position (blue) and acceleration (red) plots for a harmonic oscillator with A = 1.0 m, phi = 0 rad. and omega = 2.0 rad/s. Looking at the figure for Checkpoint C13-5, what is the phase constant Phi, of the ball in part (b)? 0 3 pi/4 pi -pi/2 pi/4 Starting positions (t = 0) for four particles moving around a circle of radius R are shown in Figure 13-15. Rank the starting positions in order of increasing phase constant of the corresponding simple harmonic motion. Figure 13-15 C-13-5. Starting posters for four particles moving around a circle of radius R Figure 13-16 A mass attached to a horizontal spring on a frictionless surface Figure 13-20 A mass-spring system oscillating in a straight line on a horizontal, frictionless surface The spring is fully stretched, and the mass is at rest. The spring is unstretched, and the mass is passing through the equilibrium position with maximum speed. The spring is fully compressed, and the mass is at rest. The spring is not fully stretched, and the mass has a nonzero speed.Explanation / Answer
1) d) phase constant
2) when object passes through x=0
3) object is when maximum negative displacement (X=-A)
4) b) unchanged , becuase speed = (2pi/T)*A
5 ) pi
6) a) 9 W , becuase work = k*d^2/2
7) c) when it is at a negative x-position (to the left of zero)
8 ) b) At the displacement maxima, all the energy is stored as potential energy due to gravity, so Etotal = U = mgh
9) a) The potential energy of the system is half the total energy at x = A/2.
10) a) moving its fastest and has its least (or zero) acceleration.
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