What are the two thing change when an object is in motion

Jake has a nine month old son. how can he build his self esteem

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?