Please help! Donnie is working on his car and uses a pulley system that can lift a 1250 N engine up to a height of 2 m by exerting a force of 250 N. How much rope would Donnie need to pull?

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

it is called kinetic energy

if they have a finite resultant