What is the work done on a box of mass 5kg that accelerates at 2m/s2 for a distance of 8m?    (give your answer with no decimal places and include a unit)

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

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?

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m