Proj motion question (1 Viewer)

[Average Boreduser]

I'm lowk stuck bc they just found a time of flight out of thin air. some oen help pls.

 

[moonsuyoung]

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I'm lowk stuck bc they just found a time of flight out of thin air. some oen help pls.

wait what r the answers?

 

[Average Boreduser]

wait what r the answers?

erm 17.15 m/s i) and ii) 6.91m

 

[Average Boreduser]

Why is phys proj motion so painful nah fr I'm just gonna integrate bruteforce this shite fk this

 

[Aeonium]

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I'm lowk stuck bc they just found a time of flight out of thin air. some oen help pls.

a) v^2 = u^2 + 2as
v^2-u^2 = 2as
v_y at max tof = 0
you know a, s, solve for u
b) tan 70 = u_y/u_x –> u_x =u_y/tan 70 = ...
r = u_x * t
then use s= ut + 1/2 gt^2

 

[shoulfer]

Why is phys proj motion so painful nah fr I'm just gonna integrate bruteforce this shite fk this

bruv phys proj motion is so dumbed down compared to 3u proj mot I don't know how you arent getting it

 

[Average Boreduser]

bruv phys proj motion is so dumbed down compared to 3u proj mot I don't know how you arent getting it

thats the problem bruh. i feel like im just pullign formulas out of thin air and its so annoying.

 

[nonya2000]

bruv phys proj motion is so dumbed down compared to 3u proj mot I don't know how you arent getting it

what's the point of using integration when you get the same answer? and this is how university textbooks teach it too. With extension 2 math, atleast they have a reason to use integration because the projectiles have air resistance

 

[Aeonium]

what's the point of using integration when you get the same answer? with extension 2 math, atleast they have a reason to use integration because the projectiles have air resistance

more intuitive than suvat and for some qns it's actually easier (for people good at math)

 

[nonya2000]

more intuitive than suvat and for some qns it's actually easier (for people good at math)

chances are the physics teachers are clueless and don't know what they are looking at when they will mark it since they don't need to understand calculus to be a science teacher for some reason. My physics teacher doesn't know how to solve quadratics properly.

 

[retroojh]

you probably have the time of flight for the whole journey (pre sure t = 0.897), where its 1. jumping to reach max height (t= 0.56) , 2. then falling down from the other side of the bar (t=0.33) . Subtract the time taken to reach max height since it asks for the bar to the ground (0.897 - 0.56) . Then since you know ur vertical velocity from part a) divided this by sin70, multiply by cos70 and multiply that by the new ToF to get your range (ans is 0.67)

 

[Aeonium]

chances are the physics teachers are clueless and don't know what they are looking at when they will mark it since they don't need to understand calculus to be a science teacher for some reason. My physics teacher doesn't know how to solve quadratics properly.

hsc accepts calculus lol

 

[Average Boreduser]

my hw ans booklet says i) 5.51 and iI) 0.67
also just think about it, u think a human is gonna land 6.91 metres after jumping a height of 1.55m?, also 17.15/sin70 = is 18.2m/s, no one is running that fast LOL

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I was looking at the wrong solutions fk

 

[PRIAPUS]

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I'm lowk stuck bc they just found a time of flight out of thin air. some oen help pls.

you are not allowed to distribute zhangs questions online according to their terms of service. im reporting you flathead

 

[retroojh]

you are not allowed to distribute zhangs questions online according to their terms of service. im reporting you flathead

chill

 

[PRIAPUS]

chill

why would i? he is breaking the law, and yall are doing nothing about it. this is infringement of intellectual property

 

[retroojh]

why would i? he is breaking the law, and yall are doing nothing about it. this is infringement of intellectual property

thats true @Average Boreduser watch your back buddy

 

[Average Boreduser]

why would i? he is breaking the law, and yall are doing nothing about it. this is infringement of intellectual property

 

[PRIAPUS]

reported. enjoy your 20 years in prison.

 

[Average Boreduser]

reported. enjoy your 20 years in prison.

NOOOOOOOOO DONT DO IT