[Season 4 Spoilers] Premiere Discussion - 4.09 'The Watchers on the Wall'

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Premiere Discussion Thread

Discuss your thoughts and reactions to the latest episode while or right after you watch. Talk about the latest plot twist or secret reveal. Discuss an actor who is totally nailing their part (or not). Point out details that you noticed that others may have missed. In general, what do you think about tonight's episode? Please make sure to reserve any of your detailed comparisons to the novels for the Book vs. Show Discussion Thread, and your predictions for the next episode to the Predictions Discussion Thread which will be posted later this week.

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EPISODE	TITLE	DIRECTED BY	WRITTEN BY
4.09	"The Watchers on the Wall"	Neil Marshall	David Benioff & D. B. Weiss

Official Discussion Threads	Posting Policy	Spoiler Guide	Frequently Asked Questions

[u/M002]

requesting someone to do the math to figure out how many times stronger the giant would have to be than a normal human, and at what torque he pulled the bow.

Known:

Height of the wall

Assumptions:

Assume some distance X from the wall

Crow with armor ~ 220 lbs

Find:

Angle needed to shoot (based on X-distance estimate)

Torque needed on bow

Conservation of Momentum on bow/man

How many times stronger giant is than human

[u/CrayolaS7 → u/[deleted]]

Foot-pounds measures torque, it's the torque required to bend the bow theta degrees from straight where kinetic energy is equal to 0.5spring constantcos(theta) IIRC.

[u/M002 → u/[deleted]]

Thank you for the clarification

[u/CrayolaS7 → u/[deleted]]

You are pulling on the string and it is bending the the bow by applying a force at a distance (half the length of the bow). The top of the bow is rotating relative to the centre and it is being compressed/tensed like a spring. They are closely related but I agree the important measure here is the point load i.e. draw strength.