Could a magnet stop a bullet?
Could a magnet stop a bullet? Usually, the answer is no. Typically, no. Most bullets aren't ferromagnetic – they aren't attracted to magnets. Bullets are usually made of lead, maybe with a copper jacket around them, neither of which sticks to a magnet. These magnets made a bullet tumble on Mythbusters, but didn't change where it hit the target.
Is steel magnetic yes or no?
All stainless steel metals are a type of steel. That means their chemical composition contains iron. In most cases, stainless steel varieties with iron in their composition are magnetic. If the alloy has an austenitic crystal structure, then it's not magnetic.
Can a magnet repel a human?
We are diamagnetic, which means we are repelled by a magnetic field. Normally, the effect is too small to be observed, however a human could be levitated by a strong enough field.