- 13,816
- 14,814
It all spawns from here.
I try to summarise the problems found:
1. From time to time we found characters that jumped good - I mean, jumping really high.
Vertical jump requires travelling upward by jumping upward, which involves a leg thrust.
KE on ground = PE stalled at a height upward
0.5 m v^2 = mgh
0.5 v^2 = gh
v = (2gh)^0.5
Can launch speed be calculated from such?
Given it is usually a leg thrust and usually legs are used in travelling, can this be a travel speed also beside from being a combat speed and reaction speed? (This will in fact be a lowball as usually human travel way faster on the ground as they do in a vertical jump.)
My opinion is that it can in fact be used on deducing travel speed, combat speed, attack speed and reaction speed.
2. Our rules say that
However, what about lifting strength?
My opinion is that lifting strength should only be limited to the mass of the object itself, subject to friction and gravity constraints. As lifting strength in our site means ability to lift a mass on Earth gravity, so rejection of back deduction of mass from theoretical KE should also reject lifting strength such calculated.
Arguments for back deducing LS from KE feat (and against my standpoint here) is that:
3. What certain types of striking strength feats can be translated into lifting strength and how they should be treated and translated?
4. How to determine object deceleration and acceleration feats and translate them into lifting strength and attack potency?
(Spider-Man stopping a moving train, some magician pushing a rocket to liftoff, etc.)
Current consensus:
1. We use trajectory to figure out speeds, so probably yes - travel speed in short burst can be calculated from vertical jumps.
2. The rule of thumb remains that "Fiction often treats the speed with which a character can move itself as unrelated to their attack potency or lifting strength".
However, there is a growing voice that lifting strength by travel speed can allow lifting strength be upgraded without having to find a feat in which a character has to carry an actually heavy object.
Moreover, as weight=mg, Armorchompy argues that it is instinctive that throwing an object should be instinctively be more impressive than just lifting it, and that we should remove the "fiction often treats the speed with which a character can move itself as unrelated to their attack potency or lifting strength" altogether - as if this had not been a golden rule in the first place.
Therefore, while we are not adding or removing any new rules, obtaining yields of lifting strength from throwing objects with an acceleration should be evaluated and assessed on a case by case basis (and has no guarantee whether such yield is applicable or not in that feat). We must make sure it does not violate any other rules at Kinetic Energy Feats and any other rules in any other aspects.
3. For the Travis jump good feat itself, the feat yield itself has been leniently approved by Migue79. Thanks.
I try to summarise the problems found:
1. From time to time we found characters that jumped good - I mean, jumping really high.
Vertical jump requires travelling upward by jumping upward, which involves a leg thrust.
KE on ground = PE stalled at a height upward
0.5 m v^2 = mgh
0.5 v^2 = gh
v = (2gh)^0.5
Can launch speed be calculated from such?
Given it is usually a leg thrust and usually legs are used in travelling, can this be a travel speed also beside from being a combat speed and reaction speed? (This will in fact be a lowball as usually human travel way faster on the ground as they do in a vertical jump.)
My opinion is that it can in fact be used on deducing travel speed, combat speed, attack speed and reaction speed.
2. Our rules say that
Do not calculate speed from kinetic energy: The kinetic energy an object was calculated to possess, in any way whatsoever, should not be considered as related through its speed. While the formula technically can be used to relate those values in both direction this is disregarded in practice. One reason for this is that fiction in general differentiates between the attack potency and the speed of a character. Another reason is that it returns unrealistic values, as even a Small City level+ punch would already have Relativistic+ speed. Out of similar reasons mass should also not be calculated from it.
However, what about lifting strength?
My opinion is that lifting strength should only be limited to the mass of the object itself, subject to friction and gravity constraints. As lifting strength in our site means ability to lift a mass on Earth gravity, so rejection of back deduction of mass from theoretical KE should also reject lifting strength such calculated.
Arguments for back deducing LS from KE feat (and against my standpoint here) is that:
(An example can be found here)there's other reasons weight lifters don't dominate jumping events such as aerodynamics, technique and weight, but considering we classify grip strength or tearing strength as eligible for lifting strength (and they're VERY different from lifting something) despite literally acknowledging they're unreliable, we either need to make our rules stricter in general or include this too. The motion of jumping is still closer to a lift than a strike and that is not deniable.
The motion of a jump is also especially close to that of a throw, which we also accept for Lifting Strength. Now, weight lifters don't dominate javelin throwing events either, no?
Our LS page specifically says throwing is acceptable as something to calculate and I've seen many calcs of that sort accepted. Don't get me wrong I'm fine with making a thread on the subject but it seems to me the wiki already accepts this somewhat.
Usually we don't make a distinction unless it's stated, pulling and pushing muscles are different but if a character can rip out a spine they get Class K all across the board, and that's without getting into gripping and crushing.
3. What certain types of striking strength feats can be translated into lifting strength and how they should be treated and translated?
4. How to determine object deceleration and acceleration feats and translate them into lifting strength and attack potency?
(Spider-Man stopping a moving train, some magician pushing a rocket to liftoff, etc.)
Current consensus:
1. We use trajectory to figure out speeds, so probably yes - travel speed in short burst can be calculated from vertical jumps.
2. The rule of thumb remains that "Fiction often treats the speed with which a character can move itself as unrelated to their attack potency or lifting strength".
However, there is a growing voice that lifting strength by travel speed can allow lifting strength be upgraded without having to find a feat in which a character has to carry an actually heavy object.
Moreover, as weight=mg, Armorchompy argues that it is instinctive that throwing an object should be instinctively be more impressive than just lifting it, and that we should remove the "fiction often treats the speed with which a character can move itself as unrelated to their attack potency or lifting strength" altogether - as if this had not been a golden rule in the first place.
Therefore, while we are not adding or removing any new rules, obtaining yields of lifting strength from throwing objects with an acceleration should be evaluated and assessed on a case by case basis (and has no guarantee whether such yield is applicable or not in that feat). We must make sure it does not violate any other rules at Kinetic Energy Feats and any other rules in any other aspects.
3. For the Travis jump good feat itself, the feat yield itself has been leniently approved by Migue79. Thanks.
Last edited: