Question: Sunlight is energy that comes from the sun. How is that energy produced?
Uranium atoms split apart, releasing nuclear energy.
Molecules break down, releasing chemical energy.
Hydrogen atoms fuse together into helium, releasing nuclear energy.
Molecules are created, releasing chemical energy.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.