DT Flashcards
Types of motion
Reciprocating
Oscillating
Linear
Rotary
1st class lever + example
Effort - fulcrum - load
E.g: crane
2nd class lever
Fulcrum - load - effort
E.g: wheelbarrow
Class three lever
Load - effort - fulcrum
E.g: fishing rod
Cycle of elliptical cam starting at max displacement (0 degrees)
Falls and rises twice with no dwell through one revolution of cam
Displacement diagram = fall, rise, fall rise
Mechanical advantage
Output force / input force or length a / length b
/ = divide
Ohms law
V= I x R
Impact of small to large pulley
Slower output speed
Increased torque
Impact of large to small pulley
Faster output speed
Decreased torque
What is the max displacement
Centre to furthest bit - centre to shortest bit = max displacement
Tension in beam
Arrows pointing away from centre
Compression in beam
Arrows pointing towards centre of beam
Resistor diagram
Rectangle
Cantilever beam + examples
Beam attached to solid surface
Traffic light
Crane
Overhanging beam
Two supports, one at centre + one at the end
E.g: diving board