0:00:02 > 0:00:05It's only a parachute jump, it's only a parachute jump...
0:00:05 > 0:00:07You're in safe hands, McCork,
0:00:07 > 0:00:09I'm a qualified instructor, remember?
0:00:09 > 0:00:11It's only a parachute jump...
0:00:11 > 0:00:15That's it, McCork, stay calm and focused, just like we practised.
0:00:15 > 0:00:18All systems checked and ready to go, Ms Hucklebuck.
0:00:18 > 0:00:19Roger that!
0:00:19 > 0:00:21We're cleared for take off!
0:00:21 > 0:00:23It's only a parachute jump...
0:00:23 > 0:00:26- TANNOY:- All passengers, please, prepare for takeoff.
0:00:26 > 0:00:28Hang on, we're doing a parachute jump!
0:00:28 > 0:00:30Aaargh!
0:00:30 > 0:00:33We're live in the sky in five, four...
0:00:33 > 0:00:35This is Brain Freeze!
0:00:35 > 0:00:38With Dr Knowles,
0:00:38 > 0:00:40Professor McCork...
0:00:41 > 0:00:43..Colin, the floor manager
0:00:43 > 0:00:45and Ms Hucklebuck!
0:00:45 > 0:00:48Stand by!
0:00:48 > 0:00:50Come on, everybody!
0:00:50 > 0:00:53Welcome to Brain Freeze, sky-dive special!
0:00:53 > 0:00:54It's time for...
0:00:57 > 0:01:02Today we're going to find out first hand, how does a parachute work?
0:01:02 > 0:01:04When an object is falling from the sky,
0:01:04 > 0:01:06the force of gravity pulls it towards Earth.
0:01:06 > 0:01:09The size and shape of the object itself
0:01:09 > 0:01:11provides some air resistance, or drag,
0:01:11 > 0:01:14but this can be significantly increased by using a parachute.
0:01:14 > 0:01:18When opened, a parachute creates a large surface area
0:01:18 > 0:01:21which increases the air resistance and causes the object to slow down.
0:01:25 > 0:01:26And what are they used for?
0:01:26 > 0:01:29Other than eejits like us jumping out of planes.
0:01:29 > 0:01:32Apart from sky-diving, parachutes are also used in
0:01:32 > 0:01:35humanitarian missions, space exploration
0:01:35 > 0:01:38and even in resistance training by athletes.
0:01:38 > 0:01:40You're all set to jump, Ms Hucklebuck.
0:01:40 > 0:01:41In your own time!
0:01:41 > 0:01:45Roger that! To see how a parachute works live,
0:01:45 > 0:01:48join us after the break!
0:01:48 > 0:01:50And we're clear!
0:01:50 > 0:01:52Now, paint yourself a nice picture, McCork.
0:01:52 > 0:01:56It's just a big, soft, safe airplane.
0:01:56 > 0:01:58A big, soft, safe airplane.
0:01:58 > 0:02:00With huge, cuddly wings, carrying you high
0:02:00 > 0:02:02above the safe, fluffy clouds.
0:02:02 > 0:02:06Huge, cuddly wings. Safe, fluffy clouds.
0:02:06 > 0:02:08Ready to jump, McCork?
0:02:08 > 0:02:10Jump! I forgot we had to jump!
0:02:10 > 0:02:13I never signed up for this!
0:02:13 > 0:02:14BELL RINGS
0:02:14 > 0:02:15Hold on tight, McCork!
0:02:15 > 0:02:18We're going live on air, in the air
0:02:18 > 0:02:21in three, two, one...
0:02:21 > 0:02:24Aaaaaah!
0:02:29 > 0:02:34Now, let's see how a parachute works in real life.
0:02:34 > 0:02:37When in freefall, a skydiver can
0:02:37 > 0:02:40fall to Earth at speeds of over 190kph.
0:02:40 > 0:02:42Can we open the parachute?
0:02:42 > 0:02:45When the downward force of the skydiver's weight
0:02:45 > 0:02:47equals the upward force of the air resistance,
0:02:47 > 0:02:50we call this Terminal Velocity.
0:02:50 > 0:02:52How about now, maybe?
0:02:52 > 0:02:54Anyone?
0:02:54 > 0:02:57Once the parachute is opened, the sky-diver's descent
0:02:57 > 0:02:58is slowed down significantly.
0:02:58 > 0:03:02Hello? Parachute? Falling through the sky!
0:03:02 > 0:03:05Oh, yes! I knew there was something I was forgetting!
0:03:07 > 0:03:13And they float back to Earth at the much safer speed of about 17kph.
0:03:13 > 0:03:16Ah, this is much better. I could get used to this.
0:03:16 > 0:03:19- Can we do it again? - See you next time!
0:03:21 > 0:03:22And we're clear!
0:03:22 > 0:03:26- More tea, McCork?- A splendid idea, Ms Hucklebuck.
0:03:26 > 0:03:31So is this what they mean by high tea?
0:03:31 > 0:03:34Ha-ha-ha! Good one, Ms Hucklebuck!
0:03:34 > 0:03:36Well done, McCork!
0:03:36 > 0:03:37You got there in the end!
0:03:37 > 0:03:39I took your advice, Colin.
0:03:39 > 0:03:42There's nothing like a nice cup of tea to calm your nerves.
0:03:42 > 0:03:46Well, usually the tea comes after you've landed, but whatever works!
0:03:46 > 0:03:50What? Landed? You mean back on the ground?
0:03:50 > 0:03:52I forgot we had to land!
0:03:52 > 0:03:56No, I never signed up for this!
0:03:56 > 0:03:58Aaah!
0:03:58 > 0:04:00This is nice once you get used to it!
0:04:01 > 0:04:03I think I can see my house from here.
0:04:05 > 0:04:07More tea, Ms Hucklebuck?
0:04:07 > 0:04:08Milk?
0:04:08 > 0:04:10Brain Freeze!