Physics

posted by .

A particle has ⃗r(0) = (4 m)j and ⃗v(0) = (2 m/s)i.
If its acceleration is constant and given by ⃗a = −(2 m/s2) (i +j), at what time t does the particle first cross the x axis?
Answer in units of s.

part 2. At what time t is the particle moving parallel to the y axis; that is, in the ˆ direction?
Answer in units of s.

  • Physics -

    part 2. At what time t is the particle moving parallel to the y axis; that is, in the j direction?
    Answer in units of s.
    im really lost and if anyone could atleast tell me which equation to use it would be greatly appreciated

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A particle has ⃗r(0) = (4 m)j and ⃗v(0) = (2 m/s)i. If its acceleration is constant and given by ⃗a = −(2 m/s2) (i +j), at what time t does the particle first cross the x axis?
  2. Calculus III- Please Help

    2. Use the properties of the dot product to show that (⃗b·⃗c)a−(⃗a·⃗c)⃗b is perpendicular to ⃗c. Must be shown for arbitrary vectors. I have tried to assign each vector (b,a,c) arbitrary …
  3. Vector Calculus

    2. Use the properties of the dot product to show that (⃗b·⃗c)a−(⃗a·⃗c)⃗b is perpendicular to ⃗c. Must be shown for arbitrary vectors. Im sorry, I'm really stuck on this. I know that is a …
  4. mitx 8.01x Classical Mechanics

    For the following 3 vectors A⃗ =2y^+3z^ B⃗ = 3 x^+2z^ C⃗ = 3 x^+3y^ Calculate the following: (a) A⃗ ⋅(B⃗ +C⃗ )= (b) D⃗ =A⃗ ×(B⃗ +C⃗ ) Dx= Dy= Dz= (c) A⃗ ⋅(B⃗ …
  5. math- calculus

    You will often see proj (Vector a onto Vector b) written as projb⃗ a⃗ .Show that projb⃗ a⃗ =(a⃗ ⋅b⃗/ b⃗ ⋅b⃗ )*b⃗ .
  6. Physics

    How much work is done by the force F⃗ =(− 3.0 i^− 7.6 j^)N on a particle that moves through displacement Δr⃗ = 3.6 i^−2.0j^m?
  7. phy

    Given three vectors a⃗ =−i⃗ −4j⃗ +2k⃗ , b⃗ =3i⃗ +2j⃗ −2k⃗ , c⃗ =2i⃗ −3j⃗ +k⃗ , calculate a⃗ ⋅(b⃗ ×c⃗ )
  8. Physincs

    You are given vectors A⃗ = 4.8 i^− 6.7 j^ and B⃗ = - 3.4 i^+ 7.5 j^. A third vector C⃗ lies in the xy-plane. Vector C⃗ is perpendicular to vector A⃗ and the scalar product of C⃗ with B⃗ …
  9. Vectors Math

    You will often see proj (Vector a onto Vector b) written as proj b⃗ a⃗ .Show that projb⃗ a⃗ =(a⃗ ⋅b⃗ b⃗ ⋅b⃗ )b⃗ .
  10. physics

    wo vectors A⃗ and B⃗ have magnitude A = 3.02 and B = 3.03. Their vector product is A⃗ ×B⃗ = -5.05k^ + 2.06 i^. What is the angle between A⃗ and B⃗ ?

More Similar Questions