Physics help

[woven snow]

Problem states: A person cutting a flat lawn pushes a lawnmower with a force of 125 N at an angle of 40.0° below the horizontal for 12.0 m. Determine the mechanical work done by the person on the lawnmower.

[native blaze]

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[woven snow]

I dont get how to draw it

I made a triangle and the bottom side is 12m, the angle is 40 degrees and Idk what to find.

Thats all I understand

|
|
|--
12m

and an angle of 4 degrees on the bottom right adjacent to the 12m.

40*

[edgy aspen]

Ok so he applies 125N force but at an angle of 40 degrees.

So in reality only 125 * cos(40) Newtons force is actually pushing it forward.

I believe they are asking how much force is exerted for the lawnmover to move 12 meters.

[woven snow]

They are asking the mechanical work

Which is W

W = F * d

[edgy aspen]

Force is 125 * cos(40).

Distance is 12.

[woven snow]

I thought force was m*a or something

[edgy aspen]

If you apply force at a certain angle then the force that pushes it forward decreases.

Also they didn't give acceleration not mass.

[woven snow]

So F = F * cosØ?

[edgy aspen]

Not always, if they ask you the forward force then yea.

[woven snow]

Man this is so hard bru, there's like a million different F's now

There's Fn, Fa, Fnet

Like Idek what anything is anymore

[edgy aspen]

That's what physics is!

[broken knoll]

it depends on the direction of the force i’m pretty sure

[woven snow]

I thought Force was always ma, if it isn't ma then Force equals itself times an angle with the cosine ratio.

[edgy aspen]

Just wait till you get to the Quanta realm, you have formulas to prove you don't know anything.

[woven snow]

Im only taking physics for the credit because of Computer Science

[edgy aspen]

Force has different forms.

[woven snow]

Yes a million

What is F || What is that?

[edgy aspen]

I think it's the forward force?

Or maybe the parallel.

Idk.

[broken knoll]

how silly

[edgy aspen]

I am not good at physics 😭

[broken knoll]

did the question clarify anything?

[woven snow]

^^

Man this is why I hate physics

[edgy aspen]

We already got it.

[broken knoll]

pls i struggle with high school physics😞😞

[edgy aspen]

125 * cos(40) * 12.

[woven snow]

So the dude is pushing a lawn mower at 40 degrees forward 125 newtons

[edgy aspen]

Force is Fcos(theta).

[edgy aspen]

Like he is pushing it into the ground.

[woven snow]

What is Fcos?

[edgy aspen]

At an angle 40 degrees.

[edgy aspen]

F * cos(theta).

[woven snow]

Which F is it?

Fa?

Applied Force?

[edgy aspen]

F is the force that is pushing the lawn mower forward.

[broken knoll]

yes

[edgy aspen]

F = 120 is the applied force.

Fcos(theta) is the forward force.

[woven snow]

So 120 * cos 40 degrees right?

[edgy aspen]

Fsin(theta) is the upward force.

[edgy aspen]

Yea.

[broken knoll]

guys genuinely wtf it hasn’t even been a semester since i did physics why am i blanking

[woven snow]

What is an example of upward force?

[edgy aspen]

Let me send a diagram.

[woven snow]

because your mind is always supposed to be practicing problems to remember.

[broken knoll]

solid advice i’ll be practicing my old notes from now on

[woven snow]

It's like training your muscles

If you train for a month and then not do anything for a month then your progress will be diminished completely

[edgy aspen]

Look at this.

[woven snow]

because you didnt consistently train your muscles.

[broken knoll]

which i should also be getting on top of bc my mother just mocked me for my lack in strength

[edgy aspen]

Ignore the friction and the other stuff.

[woven snow]

My mom does the same lmao 💀

[broken knoll]

lmao😭💀

[edgy aspen]

Fsin(theta) is the upward force and Fcos(theta) is the forward force.

[woven snow]

I did well during the winter

[edgy aspen]

BRO SAME 💀

How are we all so weak?

[woven snow]

because physics bro

[broken knoll]

ong cause gravity keeps weighing us down 😞😞

[woven snow]

This is what I spend my time doing since I gotta study

[woven snow]

💀

[edgy aspen]

I can only calculate the amount of force needed to exert but can't exert that much force 😭

[woven snow]

Why is Fsin at the top I thought that was natural force

[broken knoll]

guys this is silly why am i giggling over physics puns and jokes like get a life

[woven snow]

normal force

[broken knoll]

oh brother

[woven snow]

I keep saying natural force for some reason.

[edgy aspen]

Normal force is in the diagram as well.

What do you think N is 💀

[woven snow]

Ohhhh

I didnt see that

[edgy aspen]

Lives are overrated honestly

You got the problem now?

[woven snow]

yea im writing it rn

[edgy aspen]

Cool.

[broken knoll]

awesome sauce

[woven snow]

Ok igot F = 95.75

I got*

The answer key says 1.15KJ Idk what that is

[broken knoll]

kilojoules

alr

if that’s F

put it into the formula

f*cos(theta) i believe they said

[woven snow]

Yea

[broken knoll]

okay

[woven snow]

So 1.15 = F * cos(theta)

[broken knoll]

wait nvm

💀💀.

[woven snow]

1.15 = 95.75

Insane

[broken knoll]

nono

the answer is in kilojoules you’re working in joules

just convert

once u find ur answer

[woven snow]

Yea, 0.09575KJ

[broken knoll]

fuck i forgot my prefixes

[edgy aspen]

You bagels they asked work done.

Force * distance.

[broken knoll]

LMAO

[woven snow]

Wow

[broken knoll]

put the 12

[edgy aspen]

95.75 * 12.

[woven snow]

I'm at such a low rn, I really got called a bagel

[edgy aspen]

You guys gonna burn down the house if I leave you to it.

[edgy aspen]

Bagels are nice honestly.

[broken knoll]

i’m just a girl 😞😞

[edgy aspen]

Better than donuts.

[broken knoll]

krispy kreme glaze donuts are great tho

[edgy aspen]

^^^

[woven snow]

Ok i got 1.5 KJ

Fuck bro it says 1.15

How does this shit get 1.15

I multiplied the force * the distance I did 125 * 12

[broken knoll]

i got 1.2

[broken knoll]

show bro

😉😉.

[woven snow]

Let me get a screenshot

[broken knoll]

okie!

[edgy aspen]

How did y'all get 1.5 and 1.2?

[woven snow]

The right side

[broken knoll]

ohhh

nono

[woven snow]

1500 Joules to kilojoules is 1.5

[broken knoll]

so

(F*cos(theta))*12

ew why’d it do that

[woven snow]

Ohhh you put 95.75

[broken knoll]

yep

the one u got earlier

[woven snow]

Ohh alright

[edgy aspen]

95.75, the force that's actually pushing it forward.

[broken knoll]

you ding dong the guys alr said it

we’re so silly goose

[edgy aspen]

Imagine anyone reading this convo 💀

[woven snow]

Alright there

I got it now

[broken knoll]

awesome yay

[edgy aspen]

🎉

[woven snow]

There we go

[broken knoll]

my parents would cower in shame

[woven snow]

I got it!!!!

[broken knoll]

aww the cute stick figure

[edgy aspen]

MISSION ACCOMPLISHED!

+1 Respect.

[woven snow]

Lets gooo

Moving on to the next one

[edgy aspen]

Next one?

[woven snow]

I gotta do the homework our teacher gave us to practice

Yea

[edgy aspen]

Let's see it.

[broken knoll]

what am i doing bro i’ve got a python quiz tmrw (hopefully uni gets cancelled🙏)

[woven snow]

PYTHON

I AM FLUENT

IN PYTHON!

[edgy aspen]

L

[woven snow]

What is your test on

[broken knoll]

alr this would be Fsin(theta) this time i believe

[edgy aspen]

Are we gonna help each other's in our tests?

[broken knoll]

WELL STOP FLAUNTING 😒😒😒

[broken knoll]

just lists and strings

i honestly just gotta do the practice exercises

[woven snow]

That shit is so easy

[broken knoll]

but i took one glance at the strings practice and i quit

[woven snow]

Ok after this physics problem let me see your python thing

I'd be down to do that

[broken knoll]

okay sure awesome!

[woven snow]

What the heck is this problem asking

[broken knoll]

i figured i’d just memorize the professor’s work but i’ll take any help i can

[broken knoll]

right back to business

[edgy aspen]

Perhaps F = 0 because when pulling an object the normal =0?

[woven snow]

Yes

[edgy aspen]

Who makes these questions 💀

[woven snow]

Nelson textbook

goofy stuff

[woven snow]

Note: memorization in programming is the worst thing you can do

[edgy aspen]

They are asking for work done by the normal reaction and the force of gravity

[edgy aspen]

Programming is literally logic 💀

[woven snow]

So if F normal = 0 since you're pulling then the gravity is also 0

[broken knoll]

wait

[edgy aspen]

I think so.

[broken knoll]

yeah

[edgy aspen]

Wait let me verify

[broken knoll]

bc there’s no work done along the y-axis

oh wait

actually

[edgy aspen]

Wait, W = Fd.

[edgy aspen]

Distance along the y-axis is 0!

[woven snow]

W = 2410 * 50

[edgy aspen]

Hence WORK DONE IS 0!

[broken knoll]

yeah!

[woven snow]

yea that makes sense

[edgy aspen]

2410 is the work done 💀

[woven snow]

Ohhhh

[edgy aspen]

Also that's along the x-axis.

[broken knoll]

along the horizontal axis

[edgy aspen]

Also 50 is the "horizontal" displacement.

[woven snow]

Yea I forgot about horizontal

[edgy aspen]

Lol.

[broken knoll]

and he’s getting pulled along the horizontal axis

anyways

NEXT

[woven snow]

gravity and the normal thing is y axis so its 0 since nothing went up or down.

[woven snow]

Alright

Whats your python thing

Show me the questions

[edgy aspen]

Ye.

[broken knoll]

oh r we done w yours

?

[woven snow]

Yea

[edgy aspen]

I CAN LEAVE!

I HAVE ATTAINED FREEDOM!

[broken knoll]

YEAHHHH UNI IS CANCELLED TMRW

[broken knoll]

YAY!!

[broken knoll]

and hardly earned too

[woven snow]

I thought you'd be doing way harder things in university

[edgy aspen]

Indeed.

[woven snow]

We're doing sorting stuff in HS rn.

[broken knoll]

bro my major is literally to do w bio but python is mandatory for one semester 😞

[woven snow]

Biology seems boring

[broken knoll]

i did python in HS too it was actually a mandatory entrance exam for the uni 😒😒😒😒

[woven snow]

Like you research about plants

[broken knoll]

NUH-UHHH (i have to be a doctor)

[woven snow]

Ohh so you need biology stuff to be a doctor?

[broken knoll]

a big motivator for me is doing research on cool sht like CIPA

congenital insensitivity to pain with ahnidrosus

[woven snow]

What the

[broken knoll]

i cant spell the last word

YEAH

so basically

it’s a rare condition

where one feels zero pain and temperature

it’s extremely dangerous

[woven snow]

Ohhh

Superpowers bro

[broken knoll]

bc they could be bleeding out and they’d have no idea

they could bite their tongue off in their sleep, zero clue

[woven snow]

Ohhhh

[broken knoll]

could scratch their corneas off, how would they know

yeah

[woven snow]

...

That's scary bro

[broken knoll]

i read up a couple treatment plans and they’re literally medieval torture

bc there’s no cure

[woven snow]

Are you looking for a cure?

[broken knoll]

that’d be lovely

but no

lol

i’m not that ambitious

[woven snow]

I am master at python! 11py

Oops

print("Hello World")```

[broken knoll]

and i believe you!

which is why u will help!

wait how’d u do that

😞😞

[woven snow]

3 back ticks followed by the file type enter and then type your code

and then 3 more back ticks

[broken knoll]

huh

[woven snow]

print("Hamburger")```

[broken knoll]

ohhhh

[woven snow]

The top left of your keyboard under the squigly line

~

Under that

That's a back tick

[broken knoll]

oh yes

i see it

[woven snow]

a

[broken knoll]

hold on i’m on my phone lemme move to my laptop

[woven snow]

On phoen you wont see the coloured words/letters

phone*

[broken knoll]

so r u in high school?

[woven snow]

Yes

[broken knoll]

aww what a baby

how old r u

[woven snow]

💀

Im 16

Turning 17 in 2 weeks

[broken knoll]

i’m 17!!

[woven snow]

How the heck are you in University at 17

[broken knoll]

happy early birthday

[woven snow]

Thanks bro

[broken knoll]

freshman 🤷‍♀️

[woven snow]

Ohhhh

I see

[broken knoll]

yup

[woven snow]

Im trying to make BlackJack on Python

[broken knoll]

print("Happy early birthday yay!")```

[broken knoll]

like um the cards w the chips

[woven snow]

That's poker

[broken knoll]

i have a vague memory of playing that w my dad when i was younger

oh

[woven snow]

Blackjack is where your goal is to get as close to 21 as possible

[broken knoll]

then what tf did i play w my father

right zero clue

moving right on

[woven snow]

Lmao

What did your professor tell you about lists and strings?

Like did he teach you guys?

Do you know what indexes are and all that.

[broken knoll]

yes yes

[woven snow]

Alright that's good

[broken knoll]

okay SO thats for strinfs

and the first two i can teach myself

[woven snow]

One sec Im headed to lunch give me 2 minutes

[broken knoll]

i have no idea whats going on in the last two

omg pls dont worry abt it uni is literally cancelled tmrw

go eat

بالعافية

[woven snow]

I’ll take a look at it rn lemme see

[broken knoll]

go eat first though

children need to eat good to grow healthy!

[woven snow]

Skull 💀

Oops

I hate discord on phone

[broken knoll]

yeah its awkward sometimes

[edgy aspen]

What are you all cooking?

[broken knoll]

well they've gone to have lunch and i'm sitting smiling that uni's cancelled C:

[edgy aspen]

This convo is 342 messages long, mods won't allow such threads where the doubt is over yet the convo continues.

[broken knoll]

omg

so true

[edgy aspen]

If you want you can DM each other or smth.

[broken knoll]

do we close the thread or willl mods do that?

[edgy aspen]

OP will, by typing +close.

[broken knoll]

ok

in that case

bye