A150 g egg is dropped from 3.0 meters. the egg is moving at 4.4 m/s right before it hits the ground. the egg comes to a stop in 0.072 seconds. what is the magnitude of force that the ground exerted on the egg?

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?