Well hi. I am in 7th grade and I am learning physics. Me and my friend saw a vid on 1 of Newton's theroys. It was "time goes slower while moving faster", if i recalled right. and me and my friend wanted to go past the speed of light to break the time barrier and make time stop from Newton's work and theroy. So I am stuck on 1 question which has less friction a cone, a wedge, or a sphere? and i need to know of a matirial that can stand extreme temps. thanks in advance.