What Causes the 40 Ton Recoil in a 120mm Mortar?

  • Thread starter Ashkan
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In summary, the recoil of a 120mm mortar can refer to both the reaction force exerted from gases on the recoil mass and the transmitted force from the recoil system to the platform or vehicle. However, a ton is not an SI unit of force and can easily convert to Newtons. The variation of g may also affect the recoil, but it is considered negligible. Additionally, a ton is equivalent to 2000 pounds, which is a unit of force. The amount of groceries is measured in units of mass, not force. The gravitational acceleration constant, g, is equal to 9.81 N, and can be used to calculate the force generated by momentum conservation law.
  • #1
Ashkan
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when it is said that the recoil of a 120mm mortar is 40 tons, which one is meant to be the recoil: the reaction force exerted from gases on the recoil mass, OR the transmitted force from recoil system to the platform or vehicle (if it is mounted on a vehicle)?

Thanks...
 
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  • #2
Both, depending on context. Also, a ton is not an SI unit of force.
 
  • #3
Dickfore said:
Both, depending on context. Also, a ton is not an SI unit of force.

two words: conversion factors. :P
 
  • #4
tkshoe said:
two words: conversion factors. :P

two and a half words: variation of g.
 
  • #5
Dickfore said:
two and a half words: variation of g.

one word: negligible :)
 
  • #6
tkshoe said:
one word: negligible :)

How about on an inclined plane at [itex]\alpha = 60^{\circ}[/itex]?
 
  • #7
Dickfore said:
How about on an inclined plane at [itex]\alpha = 60^{\circ}[/itex]?

Ok... I thought you were referring to g as gravity, and therefore variation in g would be negligible since this is not a super duper mortar. But now that you have mentioned an angle... I have no idea what you are talking about. Mind clarifying what you were referring to as "g"?

Regardless, a ton is 2000 lbs and lbs easily convert to Newtons which I assume are your desired "SI" units. Hence my, albeit somewhat snide, comment about conversion factors.
 
  • #8
What is a pound a unit of?
 
  • #9
recoil is 80,000 pounds force exerted on the mortar's base plate...
 
  • #10
Dickfore said:
What is a pound a unit of?

pound is a unit of force as are tons as are Newtons with Newtons being the SI unit of force. I am done now, this is going nowhere.
 
  • #11
tkshoe said:
pound is a unit of force as are tons as are Newtons with Newtons being the SI unit of force. I am done now, this is going nowhere.

Why is the amount of groceries measured in units of force?
 
  • #12

1000Kg = 1 tonne. Is a unit of mass, not force. (1pound=0.45kg)

http://en.wikipedia.org/wiki/Kilogram"

For force: 1Kgf = 1g N = 9.81 N (10N). g = gravitational acceleration (constant)

http://en.wikipedia.org/wiki/Newton_(unit)"

From momentum conservation law.
m1V1=m2V2
m1,V1-projectile mass and speed; m2,V2- mortar mass and speed
And can calculate the force that generated the movement.
40tf (40.000 Kgf) = 400KN (400,000 N)
 
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1. What is recoil force?

Recoil force is a reaction force that occurs when a firearm is fired. It is the force that propels the bullet forward and causes the gun to move backwards.

2. How is recoil force calculated?

Recoil force can be calculated using Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. The force of the bullet being propelled forward is equal to the force of the gun moving backwards.

3. What factors affect recoil force?

Recoil force can be affected by several factors, including the caliber of the bullet, the weight of the gun, and the type of ammunition being used. The design of the gun, such as the length of the barrel and the presence of a recoil-absorbing mechanism, can also impact recoil force.

4. How does recoil force impact accuracy?

Recoil force can have a significant impact on accuracy, as it can cause the gun to move off target after firing. The stronger the recoil force, the more difficult it can be for a shooter to maintain control and accuracy when firing.

5. Can recoil force cause injury?

While recoil force is a normal part of firing a gun, it can cause injury if not managed properly. This is why it is important for gun owners to use proper shooting techniques and to choose a gun and ammunition that are appropriate for their size and strength.

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