Question

HELPP PLEASEE!!!!

The vector position of a particle varies in time according to the expression r = 5.00 − 5.00t2 where r is in meters and t is in seconds.

Calculate the particle's position and velocity at t = 3.00 s.

Answer 1

dude just sub in t=3 into your equation...

Answer 2

thts wrong

Answer 3

hmm whats the answer supposed to be?

Answer 4

idk but i put 5.00-5.00(3)^2 and that was wrong

Answer 5

is this part of the calculus course?
like do you know what derivative is?

Answer 6

yes this is part of a calculus class can you please explain to me how u geet the answer please??i got an hour to complete this and i do not understand it at all

Answer 7

I'm actually not too sure.

Answer 8

im assuming this equation is s(t) and you have to take the derivative to find velocity. you could try that. is ther no answer in the back of the textbook?

Answer 9

this is a homework that i have online. this is not in the book.

Answer 10

okay I thought about it, you do just sub in 3 for postion but because you get a negative answer you just say its heading left/west

Answer 11

and to find velocity just find the derivative of this equation and sub in 3

Answer 12

for t

Answer 13

can I say something?

Answer 14

yes

Answer 15

please do

Answer 16

you have equation for r , at t =0 , r = 5.00 . at t =3 r =... something, so after 3s, you must have r(3) -r(0)

Answer 17

sorry, I just follow the logic, never take physics before, If I am wrong, I apology for that. @dan815

Answer 18

not right

Answer 19

...so whos right. and how do we do this?

Answer 20

The vector position of a particle varies in time according to the expression r = 5.00 − 5.00t2 where r is in meters and t is in seconds.

Calculate the particle's position and velocity at t = 3.00 s.

Answer 21

dan, engineering student like you must have physics