1. Machine Notes

2. 6 Simple Machines
1st CLASS 2nd CLASS 3rd CLASS
Inclined Plane

3. 6 Simple Machines
1st CLASS 2nd CLASS 3rd CLASS
Inclined Plane
Screw

4. 6 Simple Machines Inclined Plane Screw Wedge
1st CLASS 2nd CLASS 3rd CLASS
Inclined Plane
Screw
Wedge

5. 6 Simple Machines Inclined Plane Wheel & Axle Screw Wedge
1st CLASS 2nd CLASS 3rd CLASS
Inclined Plane
Wheel & Axle
Screw
Wedge

6. 6 Simple Machines Inclined Plane Wheel & Axle Screw Pulley Wedge
1st CLASS 2nd CLASS 3rd CLASS
Inclined Plane
Wheel & Axle
Screw
Pulley
Wedge

7. 6 Simple Machines Inclined Plane Wheel & Axle Screw Pulley Wedge Lever
1st CLASS 2nd CLASS 3rd CLASS
Inclined Plane
Wheel & Axle
Screw
Pulley
Wedge
Lever

8. SIZE
DIRECTION
Machines can change the __________, _____________, and/or ______________ of force.
SPEED
Machines can not “create ___________ or do more work than the user does
ENERGY
Less force
More distance
More force
less distance

9. IDEAL MACHINES : F
Do not dissipate (lose) energy to __________, __________,
or_________
FRICTION
HEAT
SOUND F
WORK IN = WORK OUT
( )( ) = ( )( ) F
FE dE
FR dR F
Do not exist!

10. d IMA = d Can calculate for ANY machine – doesn’t have to be an
effort
Can calculate for ANY machine – doesn’t have to be an
ideal machine d
resistance
For INCLINED PLANE:
For LEVER :
Distance is measured FROM THE
For PULLEY :
____ - how far you pull rope
____ - how far the object moves OR

11. For WHEEL & AXEL :
For WEDGE :
For SCREW :

12. For a REAL MACHINE , the ACTUAL MECHANICAL ADVANTAGE is __________
Efficiency = =

13. Example 1
20 N
What is the IMA?
What is the actual MA if you must push with 10 N to lift the box?
What is the efficiency?

14. Example 2 What is the force needed to lift the box if the MA 1.75 ?
What is the efficiency?
30 N

15. Example 3 20 N What is the IMA of the ramp?
What is the efficiency if it takes 8.0 N to push the box up the ramp?

16. Example 4
What is the IMA?
If the efficiency is 90%, what force is needed to lift the box?
100N