true or false? anything that moves up and down or back and forth in a rhythmic way is vibrating.

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.