Time needed for superman to stop the train

In summary, the time needed for Superman to stop a train varies depending on factors such as speed, weight, and distance. It is estimated that it would take him a few seconds to stop a train. However, it is physically impossible for him to stop a train instantly and he uses his strength and speed to gradually slow it down. His speed also plays a crucial role in reducing the time needed to stop the train. There is a limit to the weight of the train he can stop, but his abilities are constantly evolving and he could stop most trains without difficulty. To minimize damage, he also uses his powers of flight and controls his movements to apply just the right amount of force.
  • #1
zhenyazh
56
0
hi,
can some one give me an outline of how to solve the following question?

thanks

Superman (mass=84.0 kg) must fly into a train (mass = 18079 kg) traveling at 75.0 km/hr to stop it.
Calculate the minimum time Superman must take to stop the train, if the passengers experience an average horizontal force of 0.420 their own weight.
 
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  • #2


If the train is stopped, the passengers have also stopped.
Use F=ma on a passenger
 

1. How long would it take for Superman to stop a train?

The time needed for Superman to stop a train would depend on several factors such as the speed and weight of the train, the distance between Superman and the train, and the amount of force he exerts. However, based on his abilities and past feats, it is estimated that it would take him a few seconds to stop a train.

2. Can Superman stop a train instantly?

No, it is physically impossible for Superman to stop a train instantly. He may have superhuman strength and speed, but he still needs time to exert force and stop the momentum of the train. Instantly stopping a train would also require an immense amount of force that may not be possible for even Superman to generate.

3. How does Superman stop a train without causing damage?

Superman uses his superhuman strength and speed to gradually slow down the train and bring it to a stop. He also uses his powers of flight to lift the train off the tracks and prevent it from derailing. Additionally, Superman is skilled in controlling his movements and applying just the right amount of force to minimize any potential damage.

4. Is there a limit to the weight of the train Superman can stop?

Superman's strength is not infinite, so there is a limit to the weight of the train he can stop. However, his strength and abilities are constantly evolving and have been depicted as able to lift and move extremely heavy objects such as planets. Therefore, it is safe to assume that he could stop most trains without much difficulty.

5. How does Superman's speed affect the time needed to stop a train?

Superman's speed plays a crucial role in reducing the time needed to stop a train. The faster he can move and exert force, the quicker he can stop the train. However, his speed must also be controlled to ensure that he does not cause any harm to the train or its passengers. Overall, his speed enhances his ability to stop the train effectively and efficiently.

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