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2 years ago

A wave travels down the length of a 25-meter rope in 5.0 seconds. The speed of the wave is _____.

Physics

2 answers:

Luden [163]2 years ago

7 0

Answer:

The speed of the wave is 50 m/s

Explanation:

The wave traveled through the length in 5 seconds, the speed is the distance that the wave travel at one second.

For know the speed we will use the following equation:

V = X/T

Where V is speed, X is distance and T is time).

From the information in the statement:, we know that 25 meters is our distance and 5 seconds is our time .

Replacing this values in the initial equation, we get:

V = X/T

V= 25 meters/5 seconds

V= 5 meters/s econd or 5m/s

Finally, the speed of the wave is 50 m/s.

Alborosie2 years ago

4 0

Speed
= (distance covered) / (time to cover the distance)

= (25 m) / (5.0 sec) = 5.0 m/s .

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Taking the initial position of the girl as x = 0, the position at time t of the girl is given by:

$x(t)=\frac{1}{2}a_g t^2$

where $a_g = 0.098 m/s^2$ is the acceleration of the girl.

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$x'(t)=15-\frac{1}{2}a_s t^2$

where $a_s=0.8 m/s^2$ is the acceleration of the sled, and the negative sign is due to the fact that the sled accelerates in opposite direction to the girl's acceleration.

The girl and the sled meet when x(t) = x'(t). So, we find:

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