the other day in physics I encountered gravity when a classmate, kylee during a lab was not paying attention and happened to stub her toe on the stool I was sitting on. every action has an equal opposite reaction so of course the stool fell from underneath me which then caused me to fall straight down. this occurred because there was no longer anything to support me so I tragically fell straight down. the reason for such falling is from what is called gravity. the acceleration due to gravity is 9.81 m/s squared on earth which is a pretty strong force of gravity considering on the moon such hard fall would not occur considering it is only 1.61.