I'm confused! Please help me if you can!

Suppose an objects initial velocity is 10m/s and it’s final velocity is 4 m/s. mass is constant. what can best be concluded about the object based in the work-energy theorem

What are similarities and differences between refraction, reflection, diffraction and absorption?

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.