Anyone can help me plz

Kinetic energy = 1/2mv^2. since the mass is constant we can form a ratio of it's kinetic energy at 60 divided by that at 30 to see ke(60)/ke(30) = +(60^2)/30^2). this may be said to 300% increase.

Ithink the answer is d i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

The answer is orbit around nucleus

As newton's first law states a object in motion stays in motion