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san4es73 [151]
3 years ago
9

A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST explains why

this occurred?
A) The train ran out of momentum.
B) The opposing force of friction stopped the train.
C) The natural state of the train is not to be in motion.
D) The force of gravity slowed the train until it stopped.
Physics
1 answer:
Naya [18.7K]3 years ago
4 0

Answer:

B

Explanation:

Friction always eventually stops whatever is in motion.

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Answer:

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Explanation:

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Work done in stretching the spring is equal to W=\frac{1}{2}kx^2=\frac{1}{2}\times 100\times 0.2^2=2J

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\mu =0.4081

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