# Force of a Punch to exceed the Max Static Friction Force

• h1a8
In summary, the average professional boxer's force of punch is between 500-750lb. This force can be delivered without losing footing due to factors such as the boxer's stance and mass, as well as the brief duration of the punch force. Other factors such as friction and momentum also play a role. Bio metrics can complicate the analysis of punch force.

#### h1a8

I heard that the average professional boxer's force of punch is between 500-750lb.

If the coefficient of static friction of rubber (from shoes) to say concrete is at most 0.85 then why can boxers get hit (especially in the chest) without losing footing?

Does it have something to do with the stance to increase the normal force? Or is it that when the boxer does not lose footing, the striking force was LESS than the normal force?

h1a8 said:
I heard that the average professional boxer's force of punch is between 500-750lb.

If the coefficient of static friction of rubber (from shoes) to say concrete is at most 0.85 then why can boxers get hit (especially in the chest) without losing footing?

Does it have something to do with the stance to increase the normal force? Or is it that when the boxer does not lose footing, the striking force was LESS than the normal force?
A boxer can lean in or be pushed back without having his feet move. The force of the punch is brief. The force from the floor can be longer lasting.

I would guess that the boxer's mass (intertia) must also play a role, and that a boxer standing on ice (say zero friction) could still deliver a significant fraction of that punch force.

The physical key is the time element. If the maximum force lasts only a very short time, then inertia plays a bigger role. For longer times, then friction plays a bigger role.

See if can find a plot of a boxing punch force versus time.

If you include the bio metrics, it becomes very complicated. http://boxingscience.co.uk/explosive-training-boxing/

No, one also needs to consider the duration or distance over which the force is applied - which also makes the force itself pretty meaningless.

Momentum or energy transfer would be more useful.

## What is the force of a punch?

The force of a punch is the amount of energy exerted by a person's fist when it makes contact with an object or surface.

## How is the force of a punch measured?

The force of a punch is typically measured in pounds or newtons using specialized equipment such as a force gauge or accelerometer.

## What is the maximum static friction force?

The maximum static friction force is the amount of force that must be overcome in order for an object to start moving when it is in contact with a surface.

## How can the force of a punch exceed the maximum static friction force?

The force of a punch can exceed the maximum static friction force if the punch is strong enough to overcome the resistance of the surface it is hitting and cause the object to move.

## What factors can affect the force of a punch exceeding the maximum static friction force?

The force of a punch exceeding the maximum static friction force can be affected by factors such as the strength and speed of the punch, the surface and texture of the object being punched, and the angle and technique of the punch.