00:00Stay right where you are! It's Cyberchase for real!
00:07Hello?
00:08Hi, Bianca, it's Kelly. The weather is supposed to be nice on Saturday.
00:12Do you want to go biking in Prospect Park? My bike's a little old.
00:16That's okay. My bike isn't great either. Meet you at the main entrance
00:20at 10? Okay, sure. I'll see you there.
00:23Kelly has been my best friend since kindergarten. She's good at everything.
00:28Straight A's, captain of the soccer team, homecoming queen.
00:33She's the best athlete.
00:37She's going to make me look like I need training wheels.
00:41I'll bet she'll want to race me and leave me behind on my
00:44old bike. I'll show her.
00:52Hi, can I help you? Hi. I'm looking for a bike with a lot of gears.
00:56Sure, come this way. What kind of riding do you do? Road racing? Touring?
01:00Mountain biking? Well, like Prospect Parking.
01:03Here, this is a nice all-around bike.
01:05What do all those gears do?
01:07Well, I'll show you how the gears work with a model.
01:09This large gear is like the one on the bike where the pedals are.
01:13And this small gear...
01:14Like the one on the back wheel.
01:16Now, when you turn the pedal one time, the front gear turns the back gear a certain number of times.
01:21This is what gives you power or speed.
01:23Count the number of teeth on the big gear.
01:2836.
01:29Okay, now count the number of teeth on the smaller back wheel gear.
01:3512.
01:36How many 12s are in 36?
01:38Three.
01:39That means whenever you pedal one time, the back wheel rotates three times.
01:43It makes it easier to go uphill.
01:45That is the power gear.
01:47How many teeth on this one?
01:51Nine.
01:52So that means...
01:53Well, let me see. How many nines are there in 36?
01:56Four.
01:57So that means that the back wheel goes around four times.
02:01Right. And that's the gear for speed.
02:03Speed? That's what I need.
02:05I'll be using that gear more.
02:19Wow, Bianca. That's a beauty.
02:21Thanks. The gears help me get up hills easily and get a lot of speed on the straightaway.
02:26Great. Let's go.
02:37Bianca, come back. I don't want to race.
02:42I know your bike can go very fast.
02:46But let's just enjoy this beautiful day in the park.
02:49You can save racing for another time.
03:02I shouldn't be such a show off.
03:04Kelly invited me out.
03:06And now I left her all alone.
03:08It's not very nice.
03:17Do you wear it?
03:18Uh, yeah.
03:19Me too.
03:21Yeah.
03:26There.
03:27There.
