David Smith 
Member since Dec 15, 2016

Recent Comments

Re: “The true force of a boxer's punch

Frank Leany - the force talked about would be peak force. Whenever you apply a force to something there is a force time curve or force integral or impulse. This goes from initial contact to peak force and trails of to final contact (to put it simply) Force = mass x acceration (f=ma) but f-ma=0. Therefore anything you apply a force to also pushes back with an equivalent force, this push back is called inertial force. Inertia is a body's resistance to change in (velocity) motion and is related to mass in that the larger the mass the greater the inertia. So if you punch a balloon you can't apply much force to it because it moves (changes velocity) easily. A large punch bag has a lot of mass so it inertia is high and difficult to accelerate (acceleration = change in velocity)
So when you punch a bag or a person that has a lot of mass (weight) then as it has a lot of inertia then you are able to apply a lot of force ie you can get your body weight acting on it.

1 like, 1 dislike
Posted by David Smith on 12/15/2016 at 10:57 AM

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