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Listed under:  Science  >  Forces and energy  >  Mechanical energy  >  Motion
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Why do astronauts float in space?

Have you wondered what it would be like to be an astronaut floating around in the International Space Station? In this clip, Catalyst's Dr Derek Muller investigates what causes this weightlessness in space. Derek challenges some people visiting the Powerhouse Museum in Sydney to explain why they think astronauts float. ...

Interactive

Laptop wrap: Project projectiles

A laptop-friendly resource focussed on the motion of projectiles, with links to video experiments and interactive websites that can assist students to develop a conceptual understanding of this type of motion.

Video

Making a bottle rocket

Have you ever seen someone create a rocket using a soft drink bottle? In this clip, Surfing Scientist Ruben Meerman attempts to 'supersize science'. You will find out how he made a model rocket and see slow-motion footage of the rocket as it shoots up into the sky.

Video

Future car: green, sleek and electric

Electric cars are powered by batteries rather than traditional fossil fuels, and may be the vehicles of our future. Here, Peter Pudney from the University of South Australia describes the design of an electric car that has travelled Australia and the world. Discover this vehicle's unique features that enable it to travel ...

Video

Everybody's doing the loco-MOTION!

See lots of things moving in many different ways. Watch vehicles and animals that go fast and slow. See how the size and shape of something affects the way it moves.

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Friction: friend or foe?

What part does the force of friction play in our everyday lives? Friction can be an advantage (friend) or a problem (foe). Join interviewer Doug Traction and professors Static, Slide, Rolling and Fluid at the National Tribology Research Centre as they have forceful fun investigating friction. This video won a prize in the ...

Video

A passion for robots

Want to make robots but don't know how to start? Meet the Metal Minds Robotics team. These teenagers from Northern Tasmania got into robotics through playing with Lego Mindstorms. Now they've created STEVE the robot and they're competing in national tech challenges.

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Amazing nanomedibots

Did you know that the cells in our bodies are full of tiny living nanobots? Researchers are exploring how they can create minuscule medical tools delivered as pills that could heal and cure people who swallow hem. Watch as a scientific animator shows how molecules within our bodies work and how the nano tools of the future ...

Video

Ramping it up, Egyptian pyramid style

How did the ancient Egyptians move and lift huge stones during construction of the pyramids? Secondary student Angus Atkinson designed an experiment to find out how the lives of pyramid workers could have been made easier. See how as you watch this video, which he entered in the 2013 Sleek Geeks Eureka Science Schools Prize.

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Do different things fall faster?

Want to find out what happens when you drop a watermelon and an apple from the top of a building? In this clip, Bernie Hobbs and Ruben Meerman, investigate whether the mass of an object influences how fast it falls. Bernie and Ruben ride the 'Giant Drop' at Dreamworld, drop a watermelon and apple from an eighth floor balcony, ...

Video

Make a lava lamp model using oil and water

Imagine making your very own lava lamp using materials from your kitchen and bathroom. Watch the Surfing Scientist team show you how it can be done, then try and figure out why it works.

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Lift a car with human hair?

Could it be possible to lift a car with human hair? Watch as Dr Karl collects enough hair to make a rope for such an attempt. Follow his progress at testing heavier and heavier objects until the final attempt. Can the rope of hair withstand the force?

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Examples of Bernoulli's theorem

Have you ever wondered how a yacht sails into the wind? Watch as the Experimentals team works through practical demonstrations of Bernoulli's theorem. You're in for a few surprises as you learn how gases and liquids change their behavior as they begin to flow.

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Do heavier things fall faster?

Will a medicine ball or a basketball hit the ground first when dropped at the same time from the same height? In this clip, Catalyst's Dr Derek Muller investigates what influences the speed at which objects fall. Derek challenges some people in a market to make a prediction and explain their thinking, before he finally ...

Video

Speeding: a little is a lot

As the speed of a car increases, the amount of energy also increases. When speeds above 60 km per hour are reached, the risk of crashing increases exponentially. Watch this animated road safety clip to discover how speed impacts on reaction time and braking distance, increasing the rate of crash risk.

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Anatomy of a raindrop

The water cycle is the circulation of water on, in and above Earth and it involves a number of stages and changes of state. This clip describes the water cycle and also how modern technology has contributed to our understanding of the shape of raindrops and its relationship to precipitation. Discover how raindrop shape ...

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Could robots take nearly half our jobs?

Robots can clean your floor, cook your food, build cars or even go to war. Experts say that within 20 years there could be more robots on Earth than people. How many jobs will humans lose to robots in the future?

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Meteorites, asteroids, orbiting and gravity

Learn how Galileo Galilei's work overturned Aristotle's ideas about falling objects and led to an understanding that Earth revolves around the sun. Find out how Isaac Newton showed that the laws of motion on Earth and in space are the same, and that he discovered that the gravitational force of attraction between any two ...

Video

Surviving a bed of nails

Watch the Surfing Scientist, Reuben Meerman, and Dr Karl persuade Adam Spencer to lie on a bed of nails and then use science and maths to explain what happens. Check out what happens next when they smash a concrete block on his stomach while he's lying on the bed of nails.

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School robot rescue!

Could you create a robot for a dangerous rescue mission? As part of the Da Vinci Programme at Holy Cross College, students built and programmed their own robot to follow a line through obstacles and rescue a ‘casualty' at a simulated chemical spill.