In the system shown in Figure P5.23, a horizontal force F → acts on an object of mass m 2 = 8.00 kg. The horizontal surface is frictionless. Consider the acceleration of the sliding object as a function of F r . (a) For what values of F r does the object of mass m 1 = 2.00 kg accelerate upward? (b) For what values of F r is the tension in the cord zero? (c) Plot the acceleration of the m 2 object versus F 1 . Include values of F r from −100 N to +100 N. Figure P5.23
In the system shown in Figure P5.23, a horizontal force F → acts on an object of mass m 2 = 8.00 kg. The horizontal surface is frictionless. Consider the acceleration of the sliding object as a function of F r . (a) For what values of F r does the object of mass m 1 = 2.00 kg accelerate upward? (b) For what values of F r is the tension in the cord zero? (c) Plot the acceleration of the m 2 object versus F 1 . Include values of F r from −100 N to +100 N. Figure P5.23
Solution Summary: The author explains how the object of mass m_1=2.0kg accelerates upward with a horizontal force.
In the system shown in Figure P5.23, a horizontal force
F
→
acts on an object of mass m2 = 8.00 kg. The horizontal surface is frictionless. Consider the acceleration of the sliding object as a function of Fr. (a) For what values of Fr does the object of mass m1 = 2.00 kg accelerate upward? (b) For what values of Fr is the tension in the cord zero? (c) Plot the acceleration of the m2 object versus F1. Include values of Fr from −100 N to +100 N.
Certain types of particle detectors can be used to reconstruct the tracks left by unstable, fast-moving sub-atomic particles. Assume
that a track with a length of L=2.97 mm in the laboratory frame of reference has been observed. Further assume that you
determined from other detector data that the particle moved at a speed of L=0.910 ⚫ c, also in the laboratory frame of reference. c
denotes the speed of light in vacuum. What proper lifetime would you determine for this particle from the data given?
T= 4.0
S
generated worksheet
While cruising down University Boulevard you are stopped by a cop who states that you ran a red traffic light. Because you don't
want to pay the stiff fine, you are attempting a physics defense. You claim that due to the relativistic Doppler effect, the red color of
the light λ=616 nm appeared green '=531 nm to you. The cop makes a quick calculation of his own and rejects your defense.
How fast, in terms of your speed u divided by the speed of light in vacuum c, would you have to drive to justify your claim? Note
that the speed u is taken to be a positive quantity.
U 4.0
C
Chapter 5 Solutions
Bundle: Physics for Scientists and Engineers with Modern Physics, Loose-leaf Version, 9th + WebAssign Printed Access Card, Multi-Term
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