Category 1: Simple Machines
A ramp is what type of simple machine?
inclined plane
Unit of force
Newton
MA formula (lever)
Load/Effort
Teeth ratio formula
Driver/Driven
Pivot point of a lever
Fulcrum
A lever has how many parts?
3
Formula for work
work= force x distance
MA of 300N load, 100N effort
3
10 teeth driving 20 teeth
1:2
Effort in middle lever
3rd class
What simple machine is a screwdriver?
Wheel and axle
Force that resists motion
Friction
MA of pulley with 4 ropes
4
Bigger gear = more what?
Torque
Fixed pulley changes what?
Direction
Which lever has the load in the middle?
2nd class lever
500 N force over 10 m work
5000j
If MA increases, force needed is…
less
Smaller driver gear does what to speed?
Increases speed
Moving pulley advantage comes from
number of rope strands
a system of pulleys used to lift heavy loads
Block and tackle
500: Force needed if W=600J and d=3m
200n
Output 800N, input 200N MA
4
What system controls speed in cars?
Transmission
Best lever class for lifting heavy loads → 2nd class
2nd class