2. Which properties make materials suitable for use as a core of electromagnet?

Core of electromagnets are made from ferromagnetic materials that have high permeability and low retentivity. One of the best suited materials for this is Soft iron.

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.

f=ma newton

f=100x2.5=250n