A level math helppppppppp

hey as there are people active on this forum, can i ask a mechanics question:
for part a). do you integrate , then c= 36i then substitute t=4 into equation and then that's it ?
for part b). if it's perpendicular to i does that mean i component = 0 ? then you can calculate t from that ?
for part iii). do you differentiate to get v then make it equal to 5 and then calculate t from that ?
much appreciated if i get a response soon because i have a stats + mechanics test tomorrow and i feel very unprepared thannks

Pls start your own thread.

Pls start your own thread.

why ? the forum literally says alevel helpppppp

hey as there are people active on this forum, can i ask a mechanics question:
for part a). do you integrate , then c= 36i then substitute t=4 into equation and then that's it ?
for part b). if it's perpendicular to i does that mean i component = 0 ? then you can calculate t from that ?
for part iii). do you differentiate to get v then make it equal to 5 and then calculate t from that ?
much appreciated if i get a response soon because i have a stats + mechanics test tomorrow and i feel very unprepared thannks

Because this thread is sorting out another question. Pls post your own thread to get it answered.

yeah


you're right

sorry i changed the photo

thank you !!

npp but next time make sure you start your own thread

Ok


Its not very accurate as it looks like the y axis is a tangent and it appears PQ is almost a diameter.
Can you improve it a bit?

Ok thats better. WHat radii may be important to mark on?
Is there another position the line could be?

ah okay i make a triangle? connecting the centre of the circle to the two poin

Yes, then what do you need to work out to get the equation of the line?

i need the y value of the line which I can get by doing pythagoras to calculate the length of the centre to the base of the line and then subtract that value with the y value of the circle?

Yes, and the other solution (other parallel line with chord of length 8) can be written down (very similar).
I told you little about how to solve it apart from drawing a sketch and marking the important info on.

thank you so much for the walkthrough that really helped me, to make sure, are the two values (5,-10.5(3sf)) and (14,-10.5(3sf))?

What two values? Youre asked for the equations of two lines. You dont have to calculate P and Q. Also the x difference in those points is 9, not 8.

sorry i meant the equation of the line