An object with a mass of 50.0 kg moves with a velocity of 11.2 m/s and an event occurs whereby it transfers
1,539 J of energy to another object as work.
What is the new velocity of the object after the event?

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?