 So let's say you're walking along one day when suddenly you see an alien spaceship that's crashed and the inhabitant jumps out and he says hey what do you guys do here for a good time and you can't really think of anything so you're like hockey. So you take him to Roger's place and he doesn't really know what hockey is but you're going to show him a good time and he looks at the building and he says so is this hockey and you say no it's not hockey it's called a hockey arena it's where you play hockey they're kind of the same but they're not the same. So then you go inside and you figure he should probably get a jersey so that he'll blend in and he says hey is this thing hockey and you go no it's not hockey it's a hockey jersey it's the what the hockey player wears but kind of the same no it's really different. So you get inside and then you sit down in your seats and he looks at the ice and he sees Conor McDavid score an amazing goal and he says to you hey is that little black thing flying through the air there hockey and you go dude no stop saying everything is just hockey actually that's a hockey puck there's differences here pay attention to what's going on. That's exactly how I feel when people say the word gravity you see when people say the word gravity sometimes they mean one thing but they just say gravity anyways and there's so many different things that have the word gravity in them in physics sometimes it's easier just to say gravity but we really should be more specific. I think most of the time when people talk about gravity they're probably talking about the force of gravity you know that thing that pulls you down when you fall the thing that makes the ball fall down the middle of the ground force equals mg force equals g m1 m2 over r squared force of gravity that's the force of gravity it's not just gravity take a look at those two equations that first one force of gravity equals mg it's not mass times gravity this mass times the acceleration due to gravity remember the acceleration due to gravity that was negative 9.81 meters per second squared we didn't call that acceleration just gravity it has to be called the acceleration due to gravity because there's a difference think about that other equation f equals g m1 m2 over r squared it has a capital G in there that G isn't gravity it's the universal gravitational constant we have to be careful when we're talking about these different things the words we actually say make a difference in our communication with other people about what we understand then we get into gravitational field talking about more arrows here it's easy to call these little arrows gravity these are gravitational field lines they're describing something different from just gravity so next time you are gonna think about writing down an answer to a question or you're talking about what's going on try to pick your words carefully see if you actually can distinguish between all the different types of gravity that you want to talk about if you can do that I think is gonna make you a lot easier a person to get along with especially if you're someplace you haven't been before and you're trying to have a good time