Science, Maths & Technology
Microgravity: living on the International Space Station
...care to avoid hitting anyone, swing this briskly around in a vertical circle. To keep the cup moving, you need to exert a force (in the string, called tension). To increase the force on the cup, you need to increase the speed. If you put more rice into the cup, the mass has increased, so it will move slower. These are all factors which will change the motion of the cup....