The effective spring constant for the web, which behaves like a spring, is 20N/m
The speed of the train is,
v=80 km/h
= 80 km/h(1000m/1km)(1h/3600s)
=22.2 m/s
From the law of conservation of energy, the initial kinetic energy of the train should be converted to the elastic potential energy of the web before stopping the train.
[tex]K_{train} = U_{web}[/tex]
1/2 * m * v² = 1/2 * k * x ²
k = (m * v ²)/(x ²)
= ((10⁴kg) * (22.2m / s) ²)/((500m) ²)
= 19.7N / m = 20N / m
One of the four temperate seasons, commonly referred to as spring or springtime, spring follows winter and comes before summer. There are several technical definitions of spring, but how the term is used locally depends on the local climate, culture, and customs. Autumn occurs in the Southern Hemisphere when spring does in the Northern Hemisphere, and vice versa.
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