Find the moment of about A and determine if P can pull the nail

The crowbar is subjected to a vertical force of P = 25 lb
at the grip, whereas it takes a force of F = 155 lb at the claw to
pull the nail out. Find the moment of each force about point A
and determine if P is sufficient to pull out the nail. The crowbar
contacts the board at point A. Get the book: amzn.to/2h3hcFq

[@rsenglishassignment8344]

I am not going to lie to you this saved my LIFE thank you so much you are so amazing!!!

[@minhakhan4531]

this was so helpful, thank you so much

[@justride8279]

Amazing explaination......

[@chess_from_underground]

u just saved my quiz....

[@Spectrojamz]

Nicely done🤲

[@Fireshark131313]

Py should be -8.55

[@fascinatingfacts07]

Maybe 8.55 should be negative?

[@sasukekianhoong6130]

why must i take moment at A ?

[@chethankumar.s4556]

sir do 2|75 in jl meriam Engineering mechanics statics

[@thoughtbubble3010]

When finding the moment about O, why do you ignore the y-component?

[@avishaimirlas6509]

I think cuz it is 0 since the distance to the y axis is 0

[@thoughtbubble3010]

@@avishaimirlas6509 That makes sense. Thanks

[@sal_963tal7]

please keep making videos sir don't stop we need you out here

[@Brosales1414]

How did you get the 20 degrees right next to the force P?

[@danielknapp7389]

That is exactly what I'm wondering. Gonna work through the problem but without knowing how he go that, it's incomplete to me.

[@danielknapp7389]

I think its because he shifted his Y and X axis so if you align the old X axis with new one, you have to go down 20 degrees...so the whole vector shifts.

[@mattjelski1641]

by resetting the axis the force has to be set at 20 degrees since it shifts as does the axis by 20 degrees, and using some similar triangle trig it can be applied.

[@kalyani5456]

Bro you multiplied the Py by the x distance.

[@neiljonasmanalese7181]

Why is the x component sine and y component cosine?

[@mainstreamanime9484]

did you ever find out lol

[@cads1579]

I'm asking the same question rn

[@princecliffvincentgitgano7581]

@@cads1579 just remember that the direction (angle) given is touching an axis, say x for example, we use Fcosx to find the x component. If the direction touches the y direction from the force, to find the x component we use Fsinx.

[@markicogo9900]

Because the angle frame lies at the Y axis, that's why the angle of the x component will be a SINE function, same goes to the y-components.
But if the angle lies on the x axis the angle will be COSINE functions and vice versa.

[@antonioarreola188]

@@markicogo9900 You just saved my grade

[@BennyBigIron]

402.6 lb*in should be a negative value because it is a clockwise moment

[@joshmurray4698]

it shouldn't be negative because at point O he is treating it as the origin so to get to point A the distance must be -3. This will change the negative from the clockwise moment into a positive.

[@mrsansoonQ8]

sko beaves

[@kaursingh637]

excellent --excellent - u r handwriting is very small = i am confused between sine and cosine-- i hope u mean sine --pls write big

[@shehzadkhan7570]

:)

[@chess_from_underground]

u just saved my quiz....