Machines at play
Avital Segal
Grade 5
Presentation
No video provided
Problem
Simple machines can be found
on school playgrounds
Is my thesis
Method
I looked up all the information i needed
Research
Simple machines can be found on playgrounds
Simple Machines and how they work:
Screw: Helps fasten two or more objects together.
Inclined Plane:Uses angled surfaces to move objects more easily.
Lever:A rigid bar on a central point used to help move a heavy or firmly fixed load with one end when pressure is applied to the other
Wedge:A piece of wood or some other material having one thick end and changing to a thin edge that is put between two objects or parts of objects to secure or separate them.
Wheel: A circular object that revolves on an axle and is fixed below a vehicle or other object to enable it to move easily over the ground.
Axle:a rod or spindle (either fixed or rotating) passing through the center of a wheel or group of wheels
Pulley: a small wheel with a grooved rim used with a rope or chain to change the direction of a pulling force and in combination to increase the force applied for lifting.
What is a simple machine?
A simple machine is any of the basic mechanical devices for applying a force.Simple machines can be regarded as the elementary "building blocks" of which all more complicated machines sometimes called “compound machines" are made. A simple machine is an object used to change the direction of motion or amount of required force A simple machine uses a single applied force to do work against a single load force.
Simple machines found on a playground:
Screw:N\A
Inclined Plane: Slide (Slides are inclined planes because they are ramps.)
Wedge: N\A
Lever: Seesaw,Swing
Wheel and Axle:Merry Go Round
Pulley:Zipline
A slide is an example of an inclined plane because an inclined plane also known as a ramp is plane surface that is neither vertical or horizontal. This describes the “seating surface” of a playground slide.
A seesaw on a playground is an example of a lever because mechanically, a seesaw is a lever which consists of a beam and fulcrum with the effort and load on either side.
A merry go round on a playground is an example of a wheel and axle because unlike a doorknob, this wheel and axle increases the distance the wheel travels, not the amount of force needed to turn the axle.
A zipline on a playground is an example of a pulley because at their most basic, ziplines are simply cables connected between two points that slope downward. Passengers are fitted with a body harness that clips into the cable via a pulley. These pulleys are designed to reduce friction, allowing the rider to accelerate down the line at grin-inducing speeds.
Data
N\A
Conclusion
In conclusion, we learned simple machines can be found on playgrounds and they help make playgrounds fun for kids to play on.
Citations
Acknowledgement
Thank you to my parents, my friends , my grandparents , my teachers ,and everyone else that helped me very much