## elica85 Group Title the motion of a particle is defined by the equations x=(2t+t^2) and y=(t^2) where t is in seconds. determine the normal and tangential components of the particle's velocity and acceleration when t=2s. one year ago one year ago

1. elica85 Group Title

i was able to get the speed although i don't know if i did it the right way. find dx/dt and dy/dt, plug in t=2, |v|=7.21m/s

2. Pallavi06 Group Title

different the both equations with respect to time to find the equations of velocities in normal and tangential direction.... put t=2 to find value of velocty at that time......

3. elica85 Group Title

4. elica85 Group Title

so i'm stuck on finding a_n and a_t

5. Pallavi06 Group Title

u have to find normal and tangential velocity....why are u finding a_n and a_t???

6. Pallavi06 Group Title

and a_t is 2 ....

7. elica85 Group Title

that's what the problem asks. i already found v_t ^^^ and v_n=0.

8. elica85 Group Title

a_t is not 2 according to answer on the back

9. elica85 Group Title

that's what i thought since a=second derivative of x(t)

10. elica85 Group Title

but it's not..

11. Pallavi06 Group Title

the equations shows that partical is moving in a parabolic path....

12. elica85 Group Title

right, so..

13. elica85 Group Title

gotta run, i appreciate the help. i will check back later, thx thx thx

14. Pallavi06 Group Title

hey $a (total) = \sqrt{a_t ^{2}+a_n ^{2}}$

15. Pallavi06 Group Title

i am sorry coudnt help u more than this....