How scientists decide if an exoplanet might be like Earth?

Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear

What properties of a moving object are used in determining the object's energy of motion

How can a cyclist's acceleration change even if its velocity remains constant?