How many feet does a 700 lb object take to stop?

  • Thread starter logan97
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In summary, the conversation is about the stopping distance of a 700 lb object at different speeds, specifically 20 mph, 30 mph, and 40 mph. The expert explains that the stopping distance would be zero if the object hits an immovable object, but if it is stopped by other means, such as brakes on a 4-wheeler motorized vehicle, it would depend on factors like friction. The conversation also mentions the possibility of finding charts or guidelines for stopping distances and the expert provides a link to a resource for this information.
  • #1
logan97
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0
hope I am in the right forum?

how many feet does a 700 lb object take to stop? @ 20 mph, 30 mph, 40 mph ?
 
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  • #2
Zero...If it hits the proverbial Immovable Object.
Otherwise you need to know something about what's stopping the object, like friction.
 
  • #3
schip666! said:
Zero...If it hits the proverbial Immovable Object.
Otherwise you need to know something about what's stopping the object, like friction.


sorry not enough info. It would be brakes on a 4 wheeler motorized vehicle.
 
  • #4
To point you in the right directions, I am sure there are institutions (Department of Transportation?) that have "rules of thumb" charts about stopping distances for certain kinds of vehicles of certain weight in certain weather conditions with certain types of tires.

Maybe someone else can point you to a source or you can see if Google turns up anything.
 
  • #5
This brings up foul memories of how I almost failed my driver's-ed class due to a poorly constructed question about using the stopping distance formula which had been pounded into us by our autocratic (pun intended) teacher...

OK. It's been 45 years. I'm over it and can now just google "automobile stopping distance" to find this handy explanation and chart:

http://www.csgnetwork.com/stopdistinfo.html
 

FAQ: How many feet does a 700 lb object take to stop?

How is the stopping distance of an object calculated?

The stopping distance of an object is calculated using the formula: stopping distance = (initial velocity)^2 / (2 x deceleration). This formula takes into account the initial velocity of the object and the rate at which it decelerates.

What factors affect the stopping distance of an object?

The stopping distance of an object is affected by its initial velocity, the surface it is traveling on, and the force of friction acting against it. Other factors such as air resistance and the shape of the object can also play a role.

How does the weight of an object impact its stopping distance?

The weight of an object does not have a direct impact on its stopping distance. However, a heavier object may require a greater force of friction to stop it, resulting in a longer stopping distance.

What is the relationship between speed and stopping distance?

There is a direct relationship between speed and stopping distance. As speed increases, the stopping distance also increases. This is because the object has more kinetic energy and therefore requires a greater force of friction to stop it.

Can the stopping distance of an object be reduced?

Yes, there are several ways to reduce the stopping distance of an object. These include decreasing the initial velocity, using a surface with higher friction, and reducing the weight of the object. Additionally, implementing safety measures such as brakes or airbags can also help decrease the stopping distance.

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