2-d Problem

  • Thread starter Filenes
  • Start date
  • #1
Filenes
4
0

Homework Statement


The vector position of a particle varies in time according to the expression r = (7.40 i - 6.60t2 j) m.
(a) Find expressions for the velocity and acceleration as functions of time. (Use t, i, and j as necessary.)
v =
a =
(b) Determine the particle's position and velocity at t = 2.00 s.
r =
v =


Homework Equations


kinematic of 2-dimen
r= v/t

The Attempt at a Solution


I found (b) r.. but i have no clue how to start part (A), i thought since R = V/t then
r =(7.40i - 6.60t^2)/ t but that was wrong.. so I'm thinking that r should be change into something. Any help would be great
 

Answers and Replies

  • #2
LowlyPion
Homework Helper
3,115
6
What is the definition of Velocity and Acceleration with respect to distance and time?
 
  • #3
AshesToFeonix
12
0
r/t is average velocity. your trying to find the instaneous rate of change. which means its time to put that calc 1 to use!
 

Suggested for: 2-d Problem

Replies
1
Views
564
  • Last Post
Replies
2
Views
325
Replies
3
Views
382
Replies
33
Views
1K
  • Last Post
Replies
7
Views
270
Replies
7
Views
420
Replies
6
Views
601
  • Last Post
Replies
2
Views
454
Replies
5
Views
2K
Top