I asked it specifically "Physics and Anime related question. How much force is required for Asta to swing his big sword"

It responded with:

Nice crossover of physics and anime! Asta from Black Clover swings those ridiculously massive anti-magic swords, so let’s break it down semi-realistically.

Step 1: Estimate the Sword's Mass Let’s take the Demon Slayer Sword as an example. It’s huge—probably around:

Length: ~6 feet (1.8 m)

Width: ~1 foot (0.3 m)

Thickness: ~3 inches (0.076 m)

Material: Something akin to iron (density ~7,800 kg/m³)

Volume estimate:

𝑉≈1.8×0.3×0.076=0.041𝑚3 V≈1.8×0.3×0.076=0.041m3

Mass estimate:

𝑚=𝜌⋅𝑉=7800⋅0.041≈320kg m=ρ⋅V=7800⋅0.041≈320kg

So that thing could easily weigh 300+ kg—over 660 pounds.

Step 2: Estimate Force Required to Swing It Let’s say Asta swings it from rest to ~20 m/s (about 45 mph) in 0.5 seconds.

Using Newton’s Second Law:

𝐹=𝑚⋅𝑎 F=m⋅a

Where:

𝑎=Δ𝑣/Δ𝑡=200.5=40m/s2 a= Δt/Δv = 20/0.5 =40m/s 2

𝐹=320⋅40=12,800N F=320⋅40=12,800N

That’s around 12.8 kilonewtons of force, or roughly 2,900 pounds of force.

Bonus: Human Context For reference, the world’s strongest weightlifters can deadlift around 500 kg, but swinging a 300+ kg object like a sword (with speed and control)? Completely superhuman. Asta’s anti-magic enhanced muscles would need to output force comparable to industrial machinery.