Http://. Machine- a device that makes work easier by changing the direction or size of the force.

22
http://www.youtube.com/watch?v=qybUFnY7Y8w

Transcript of Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Page 1: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

http://www.youtube.com/watch?v=qybUFnY7Y8w

Page 2: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Machine- a device that makes work easier by changing the direction or size of the force.

Page 3: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Work- Force move an object in the direction of the Force

Work = Force x Distance

Page 4: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Work input- Work done on a machine.

Page 5: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Work output- Work done by the machine.

Page 6: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Mechanical Advantage (M.A.)- number of times a machine multiplies the force input to it.

Page 7: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Mechanical Efficiency – Ratio of work output divided by work input.

work outputwork input

Page 8: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Incline Plane- A straight slanted Surface.

Page 9: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

M.A. of an incline plane-

length of incline divided by the height object is raised

Page 10: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Screw- an incline plane (straight angled surface) wrapped around a cylinder.

Page 11: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Wedge- two inclined planes.

Page 12: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Lever- a bar that pivot around a fixed point.

Page 13: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Fulcrum- the fixed point in which a lever pivots around.

Page 14: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Input arm- the distance from the fulcrum to the input force.

Page 15: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Output arm- the distance from the fulcrum to the output force (load).

Page 16: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Load- Object being moved.

Page 17: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Wheel & Axle- 2 circular objects of different sizes

Page 18: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

M.A. of a Wheel & Axle-Radius of the WheelRadius of the axle

Page 19: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Pulley- grooved wheel with a rope around it.

M.A. of pulley- count the number of rope segments. (-1 if it has a fixed pulley)

fixed

Page 20: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

Compound machine- two or more simple machine working together.

Page 21: Http://. Machine- a device that makes work easier by changing the direction or size of the force.
Page 22: Http://. Machine- a device that makes work easier by changing the direction or size of the force.

http://www.youtube.com/watch?v=qybUFnY7Y8w