The Bloodhound supersonic car will use a parachute's drag and air resistance to slow it down from 1000 mph. But what design makes the best parachute? Children from Links Primary School in London ...

Annie Beresford:So if it's going that fast, how do you think we slow this car down? BOTH:Parachutes? Annie Beresford?Parachutes, that's right. We've got two parachutes sitting at the back of the car.