physics
posted by ashley  .
If an observer is traveling parallel to a rod at twice the speed of the rod, what is does the observer perceive the length to be?
Choose one answer.
a. The length of the rod remains the same.
b. The length of the rod will become twice its original value.
c. The length of the rod will become half of the original value.
d. The length of the rod will decrease.

physics 
bobpursley
Hmmmm. wouldn't it matter how fast the rod was traveling, especially if it were say going .4c, and you were moving .8c?
Respond to this Question
Similar Questions

physics
A.An observer moving at a speed of 0.810 c relative to a rod measures its length to be 2.00 m and sees its length to be oriented at 30.0 degrees with respect to the direction of motion. What is the proper length of the rod? 
physics
If an observer is traveling parallel to a rod at twice the speed of the rod, what is does the observer perceive the length to be? 
College Physics
A rod of mass 4.3 kg and length 4.3 m hangs from a hinge as shown in Figure P9.28. The end of the rod is then given a “kick” so that it is moving at a speed of 2.3 m/s. How high will the rod swing? 
physics
If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe about its length? 
Physics
The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D? 
Physics
If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe about its length? 
Physics
The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D? 
Physics
The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D? 
physics
A uniform rod is set up so that it can rotate about a perpendicular axis at one of its ends. The length and mass of the rod are 0.849 m and 1.17 kg. What constantmagnitude force acting at the other end of the rod perpendicularly both … 
Math, Algebra
Rod a is twice as long as rod b, rod c is 1/12m shorter than rod b. If rod c is 1/6m long, find the total length of Rod a and Rod b I thought it would be 2x+(x+1/12)+1/6