# Help Me Tackle This Question: How Do I Start?

• dantetoledo
In summary, the conversation discusses the importance of rotational dynamics and conservation of angular momentum in various engineering fields. The importance of these concepts is demonstrated through the use of purely rotational machines in developed societies, such as pistons and cogs. The conversation also highlights the connection between rotational motion and everyday machines, such as the crank in a car's starter motor. Overall, understanding rotational dynamics and conservation of angular momentum is crucial in the field of engineering.
dantetoledo
Homework Statement
What is the importance of rotational dynamics and conservation of angular momentum in various engineering fields?
Relevant Equations
N/A

dantetoledo said:
Homework Statement:: What is the importance of rotational dynamics and conservation of angular momentum in various engineering fields?
Relevant Equations:: N/A

Welcome to PF.

We cannot offer tutorial help until you show your best efforts. Can you define "rotational dynamics" and "angular momentum"? Where do you see them come into play in, for example, Mechanical Engineering?

Welcome !
Can you mention two purely rotational machines that have become very important to developed human societies?

Lnewqban said:
Welcome !
Can you mention two purely rotational machines that have become very important to developed human societies?
Pistons, cogs.

dantetoledo said:
Pistons, cogs.
No, no; those are parts.

Whole machines which internal moving parts only rotate around a shaft (no reciprocating parts).

Lnewqban said:
No, no; those are parts.

Whole machines which internal moving parts only rotate around a shaft (no reciprocating parts).
Can you give some examples?

dantetoledo said:
Can you give some examples?
No, that is your assignment. You seriously can't think of any machines that we use every day that involve rotational motion? Walk outside and look around...

Lnewqban
In the old days, starting a car involved hand-cranking until electric starter motors replaced the cranks. What was the crank connected to? Hint: It's an eight-lettered F-word.

Lnewqban
kuruman said:
What was the crank connected to? Hint: It's an eight-lettered F-word.
Woo-wee, beats me! I'll wait until the OP figures it out...

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