Special relativity help: meter stick moving at 0.60c

In summary, when a meter stick is moving at 0.60c, its length decreases due to length contraction and its time appears to slow down due to time dilation. However, the mass of the meter stick remains constant. According to special relativity, the maximum speed a meter stick can travel at is the speed of light, which it can never reach. This is because as an object approaches the speed of light, its mass and energy increase infinitely.
  • #1
positron
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0
A meter sticks moves with velocity 0.60c relative to an observer. The observer measures the length of the meter stick to be L. The problem states that 0.80<L<1.0 m must always be true.
So far, I have determined that
Gamma = 1/sqrt(1-0.60c^2/c^2) = 0.8.
What I don't understand is why there is a range. If the meter stick is 1 m when it is not moving and 0.8m when it is moving at 0.80c, why is there a range for the length?
 
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Is velocity a vector?
 
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The range for the length of the meter stick is due to the effects of special relativity. According to this theory, as an object moves at high speeds, its length in the direction of motion appears to contract for an observer who is stationary relative to the object. This phenomenon is known as length contraction.

In this scenario, the observer is stationary and the meter stick is moving at 0.60c. The observer measures the length of the meter stick to be L. However, if the meter stick was measured by an observer who is moving at the same speed as the meter stick, the length would appear to be shorter due to length contraction.

The range of 0.80<L<1.0m is a result of this length contraction. The actual length of the meter stick is 1m when it is not moving, but as it moves at 0.60c, the observer measures it to be shorter, between 0.80m and 1.0m. This range reflects the varying measurements of the meter stick depending on the relative motion between the observer and the meter stick.

In summary, the range for the length of the meter stick is a consequence of special relativity and the phenomenon of length contraction. It is a fundamental principle of this theory that the length of an object appears to change depending on the relative motion between the observer and the object.
 

Related to Special relativity help: meter stick moving at 0.60c

1. How does the length of a meter stick change when it is moving at 0.60c?

The length of a meter stick decreases when it is moving at 0.60c due to the effects of length contraction in special relativity. This means that an observer measuring the length of the meter stick while it is in motion will see it as shorter than its rest length.

2. How does time dilation affect a meter stick moving at 0.60c?

Time dilation is the phenomenon in which time appears to slow down for an object moving at high speeds. This also applies to the meter stick moving at 0.60c, meaning that an observer measuring the time it takes for the meter stick to travel a certain distance will see it as taking longer than it would at rest.

3. Is there a maximum speed that a meter stick can travel at in special relativity?

According to special relativity, the maximum speed that any object can travel at is the speed of light, which is approximately 299,792,458 meters per second. Therefore, a meter stick can never travel at 0.60c or any speed greater than the speed of light.

4. How does the mass of a meter stick change when it is moving at 0.60c?

The mass of a meter stick does not change when it is moving at 0.60c. This is because special relativity does not account for changes in the mass of objects due to their motion. However, the energy of the meter stick will increase due to its high velocity.

5. Can a meter stick ever reach the speed of light in special relativity?

No, a meter stick (or any object with mass) can never reach the speed of light in special relativity. As an object approaches the speed of light, its mass and energy increase infinitely, making it impossible to reach the speed of light. This is known as the mass-energy equivalence principle.

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