How to Calculate Impact Force Without Knowing Stopping Time or Distance?

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Homework Help Overview

The discussion revolves around calculating impact force, specifically in scenarios involving an object dropped from a height and the forces experienced during strength training movements. Participants are exploring the relationship between weight, height, and the dynamics of force during impact.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are questioning whether impact force can be determined with the given information about weight and height. There is also a discussion about the forces experienced during strength training, particularly during the transition phases of lifting weights.

Discussion Status

Some participants have pointed out the need for additional information, specifically regarding the stopping distance or time to calculate impact force accurately. There is an ongoing exploration of different scenarios and interpretations of the problem, particularly in relation to strength training dynamics.

Contextual Notes

Participants have noted the distinction between the falling distance and the stopping distance, indicating that this is a critical factor in the calculations being discussed. There is also a mention of forum rules regarding homework help, which may influence the nature of the discussion.

alexa23
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calculating impact force??

I need help calculating impact force. Here's all the information I have:

the object weighs 180 pounds
being dropped from a height of 11 feet

I'm not completely sure if the force can be determined from that. I'm having a hard time figuring it out for some reason.
 
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Hi Alexa
I recommend you to read forum rules before posting because your thread seems like a homework and homeworks are discussed in other forum.
By the way welcome to PF
 


alexa23 said:
I need help calculating impact force. Here's all the information I have:

the object weighs 180 pounds
being dropped from a height of 11 feet

I'm not completely sure if the force can be determined from that. I'm having a hard time figuring it out for some reason.

Hi all,

I would like to ask the same thing, and first to prove its not homework, first I am 48, and second, we were wondering how mush force the muscles would be taking on the transition from negative to positive, like in strength training, and repping a barbell up and down. We call this transition MMMs {Momentary Maximum Muscle Tensions}

These tensions or forces are as you imagine the highest there is in the whole rep. {repetition} As when you are on the eccentric of the rep, you are still controlling it down, but when a given load is lowed quite fast, the acceleration component means that the forces exerted on the load (and thereby by the muscles) by far exceeds the nominal weight of the load.

Would it be possible to work out the force of ? Let’s say a 90kg weight, dropping at .5 of a second for 1m, please ?

Wayne
 


More information is needed. Specifically, either how long or over what distance is the object brought to a stop? Note, this is different than the time or distance that the object is falling.
 


Redbelly98 said:
More information is needed. Specifically, either how long or over what distance is the object brought to a stop? Note, this is different than the time or distance that the object is falling.

Hmm, as you can see this is a bit tricky to say, as when you are repping up and down with a barbell it quite hard to tell.

Therefore, what we say the last fifth of the eccentric, and that would also be one fifth of .5 of a second.

And thanks for you time.

Wayne
 

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