Kinematics

[dense falcon]

Last part pls

[vapid elk]

so you've got a displacement equation for B

what's the derivative of displacement?

[dense falcon]

v

i got kinda far into it but stuck

[vapid elk]

yeah, so differentiate your equation for the distance for B

and sub in t

[dense falcon]

ms uses a=0.18t to find v=0.09t^2 which i did then they find displacement and sub in 16

To get 122.88

Then set up a suvat which kinda got me confused

[vapid elk]

suvat?

it's variable acceleration though 🤔

ohhhh wait that's only for 0 < t < 5

that's where the suvat comes from

[vapid elk]

yeah so they find the distance from O that they both collide at. you should be able to find how far B has travelled before decelerating, and then apply SUVAT

'cause you then know how far B travels (from when it's V is 9, to when t=16), time (1 second) and u (9)

[dense falcon]

bro im too fried to comprehend that

I dont understand

my brains fried from pure

[vapid elk]

find where B is when it starts decelerating, and using that, find how far it travels whilst decelerating

that's S

U is 9

V is what you want

and T is 1

'cause it takes 1 second

and then use some suvat

[dense falcon]

so start with area under 15-16?