\large KE=\frac{1}{2}\cdot m\cdot v^2 \large E_{Total}=GPE+KE \large GPE=m\cdot g\cdot h \large g=10\frac{m}{s^2}

answer: he got 23

explanation:

answergravity;

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.