http://www.greencouncil.org/ 香港環保標籤計劃 環保由教育開始 Conservation begins with Education 主辦 DEFINITION OF A ROBOT “ A robot is a machine that can move and do some of the work of the human being” A SHORT HISTORY OF ROBOTS 270 BC A Greek engineer made organs and water clocks with movable figures
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Conservation begins withEducation
“A robot is a machine that can move and do some of the work of the human being”
270 BC A Greek engineer made organs and water clocks with movable figures
1801A textile machine which is operated by punch cards called a programmable loom and goes into mass production
1818Mary Shelley wrote "Frankenstein" which was about a frightening artificial lifeform created by Dr. Frankenstein
1892Seward Babbitt creates a motorised crane with gripper to remove ingots from a furnace
1961The first industrial robot was on a production line a General Motors automobile factory in New Jersey
1963The first artificial robotic arm to be controlled by a computer was designed
2000Honda showcases Asimo, the next generation of its series of humanoid robots
Robot built for environmental purpose.
Nuclear WasteManagement Robot
Founded by 3 Physic Teachers in US
How do Newton's laws of motion apply tomousetrap powered vehicles?
Every material object continues in its state of rest or in uniform motion in a straight line unless it is compelled to change that state by forces acting on it
The acceleration of an object is directly proportional to the net force acting on the object (in the direction of the net force) and is inversely proportional to the mass of the object
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first
Most often stated:For every action there is an equal and opposite reaction
1. To encourage creative, practical, and environmental idea for our Mother Earth
2. To encourage teamwork
3. To develop interpersonal and group skills
4. To encourage honesty and fair play in life situations through competition
5. To develop responsibility and integrity
Velocity: 3 ft per sec
6 Feet Car
30 Feet Car
12 Feet Car
42 Feet Car
54 Feet Car
Kick Ass Mousetrap Car 80 Feet Car
World Record! 128 Feet Car!
Number of Wheels
Newton First Law
Newton Second Law
Center of Mass
Wheel to Axle Ratio
StringPOINTS TO CONSIDER FOR YOUR MOUSETRAP CAR
PHYSICS OF THE CAR
1. Keep the wheel to axle ratio as low as possible. For every time your axle goes around, your wheel goes around one time. If the wheel has a much larger circumference than the axle, the car will go a long ways. Technically, the inertia of the rod extending from the mousetrap is less than that of the wheels, so by using a longer arm and a lower wheel to axle ratio, you may get further distance.
2. Keep the friction between the wheels and your car as low as possible. Using ball bearings from a pair of roller blades is a good way to do this.
3. Torque - you only get a little bit out of a mousetrap, so don't waste it.
Q: Why is reducing the mass of the vehicle important?
A: Because by reducing the weight of the vehicle you have less force pushing on the friction points.
Q: What will happen if force is on the vehicle?
A: The force will pull the vehicle by decreasing the rotational inertia by removing mass from inside of the wheels.
Q: Why do you decrease the overall mass of the car?
A: Removing mass from the frame and using a lighter weight lever arm decreases the mass of the car because heavier lever arms consume energy when the spring is required to lift them.
Q: How do you decrease rolling friction?
A: By reworking friction points.