Linking Components & Guiding Controls
If two linked mechanical parts can only be separated if broken, what is the known linking characteristic of this object?
Non-removable
What component always starts the motion in a system?
Driver component
Which motion transformation system is used to transform rotational motion to translational motion to allow for steering in a car?
Rack and Pinion
How does current flow from a battery in a circuit?
From the positive terminal to the negative terminal
What type of deformation is present when a constraint is so intense that the material breaks?
Fracture
What type of guiding allows the lid of a water bottle to be taken off and put back on?
Helical
The belt in a belt and pulley system is called?
Intermediate Component
Of screw gear type 1 and type 2, in which one is the screw the driver (fixed component) and the nut is the driver (free moving component)?
Screw gear type 1
What are the four forms of energy that electrical energy can be transformed into?
Light
Sound
Kinetic
Thermal (heat)
What are the 5 types of material constraints?
Compression
Tension
Torsion
Deflection
Shearing
What two types of motion are combined to create helical guiding motion?
Translational and rotational
If the driver component of a gear system can also be the driven component, what does this tell us about the system? Give an example of a type of system that follows this rule.
It is reversible
Ex. Gear train, friction gears, sprocket and chain, belt and pulley
If gear 1 in a gear train has 32 teeth (and therefore a larger SA), gear 2 has 12 teeth, and gear 3 has 24 teeth, will the speed increase or decrease from gear 2 to 3? Will it increase or decrease from gear 1 to 3?
2→3: decrease
1→3: increase
What are two ways of protecting a circuit from short circuiting or overloading?
Fuse - metal wire that melts with too much current, interrupts current
Breaker - automatically disconnects circuit if overloaded
Resistor - limits flow of electrons in a circuit
What is an important constraint characteristic for a rock climbing ROPE to be able to undergo in order to keep a climber safe?
Tension
If I have a paintbrush which comes apart, but I am able to glue it back together and it works just as well as before, then the linking characteristic of this paintbrush is then removable?
True or False?
False
What type of motion transmission system do we use for fine-tuned movement? Is this system reversible or non-reversible?
Worm and wheel gear
Non-reversible
Of the 5 motion transformation systems, which 2 are reversible?
Options: Screw Gear Type 1, Screw Gear Type 2, Cam & Follower, Rack & Pinion, Rod & Crank
Rack & Pinion and Rod & Crank (the 2 R’s)
What is the difference in how a voltmeter and an ammeter are connected to a circuit?
Voltmeter - ALWAYS connected in parallel (“outside” circuit)
Ammeter - ALWAYS connected in series (a “a part of” circuit)
What are two mechanical properties that are important for a hammer to possess in order to be an effective tool?
Resilience, Stiffness, Hardness
What are the four linking characteristics of a pen and pen cap?
Direct
Rigid
Removeable
Complete
The rotational motion of the driver sprocket drives the rotational motion of the driven sprocket using the chain as the intermediate component. What Motions Transmission System am I?
Sprocket and Chain system
What is the speed ratio of a chain and sprocket system where the driver gear has 18 teeth and the driven gear has 6 teeth, and is the speed increasing or decreasing in this system?
18/6 = 3
Increasing
You have connected both a voltmeter and ammeter to a circuit in hopes to figure out the resistance of the circuit that uses a 200 W lightbulb. You measure the voltage to be 21 V, but cannot get a reading on the ammeter. Can you still figure out the resistance with the given information, and if yes, what is it?
Yes, by finding the current intensity first, then resistance.
I = 200 W/21 V
I = 9.5 A
R = 21 V/9.5 A
R = 2.2 Ohms
What are the four important properties of wood and modified wood, and what is one way we can protect this material from degradation?
Hardness, elasticity, resilience, and stiffness
Protection: staining/treating/painting