Forces and safety features

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Presentation transcript:

Forces and safety features By Kimberly Wilson

Forces and falling objects Gravity is the force pulling downwards Resistance is a force working against gravity to slow down falling objects

A Parachute A large surface area and a parachute help to create resistance against gravity and slow a falling object down.

Car safety features and Shock absorbtion Crumple zones and air bags act as shock absorbers taking most of the force in an accident instead of a human. Seat belts also help to prevent injury.

Other design factors Shape – which would fall faster? Why? The helicopter has most of its weight towards the bottom. Why?

references Parachute picture: http://www.cedric-thoma.fr/2011/01/07/roseline-sarkissian-quitte-fontainebleau/ Car crumple zone picture: http://www.abovetopsecret.com/forum/thread939932/pg2 Airbags picture: http://blogs.theprovince.com/2011/11/04/firefighters-use-the-jaws-of-life/ Helicopter Picture: http://www.stjohnambulance.com.au/st-john/ambulance-services/emergency-rescue-helicopter Cone and Cube Picture: http://gid70.rageyart.com/Lesson03/L03_learn.t3.html Gravity and Resistance Picture http://www.mikecurtis.org.uk/ks2_friction.htm

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