Question

I need help with this, I'm not sure I'm doing it right. It's calc/physics

Answer 1

I plugged in 2 for t and got -21 is that right?

Answer 2

well is 2^3-3(2)^2-9(2)+1 equal -21?

Answer 3

you would have to follow of operations to verify

Answer 4

ya it's -21, but am i allowed to have a negative position?

Answer 5

exponents first
2^3=8
2^2=4
8-3(4)-9(2)+1
now take care of the multiplication
I will let you do that and tell me what you get

Answer 6

Doesn't that just mean the particle is to the left of its starting point

Answer 7

or I guess it could mean down from the starting point

Answer 8

neg means it is in the left direction or down direction
pos means it is in the right direction or up direction

Answer 9

so it's like going backwards and it's 21 meters behind where it started?

Answer 10

yeah the particle went to the left 21 units after 2 seconds
(or whatever the time units are)

Answer 11

alrighty thankss

Answer 12

and the left direction is shown by that decreasing motion on this graph from 0 to 2