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Homework Statement
r1=(0m)
r2=(2000i + 1000j)m
v1=(200j)m/s
v2=(200i-100j)m/s
Homework Equations
tantheta=vy/vx
v2^2=v1^2+2ax
v2=v1+at
x2=x1+v1t+1/2at^2
The Attempt at a Solution
Thank you for any help
Are those kinematic equations for components of vectors, or for vectors themselves?PEZenfuego said:Homework Statement
View attachment 50618
r1=(0m)
r2=(2000i + 1000j)m
v1=(200j)m/s
v2=(200i-100j)m/s
Homework Equations
tantheta=vy/vx
v2^2=v1^2+2ax
v2=v1+at
x2=x1+v1t+1/2at^2
The Attempt at a Solution
View attachment 50617
Thank you for any help
SammyS said:Are those kinematic equations for components of vectors, or for vectors themselves?
Sorry for the slow response.PEZenfuego said:If you click the first picture, you will have an understanding equal to mine. I'm sorry.
SammyS said:Sorry for the slow response.
I should have been more direct with my earlier response.
The set of kinematic equations you have(v2)^{2}=(v1)^{2}+2axare valid for each component of displacement, velocity, and acceleration.
(v2)=(v1)+at
x2=x1+(v1)t+1/2at^{2}
So you have two such sets of kinematic equations:(v2)_{x}^{2} = (v1)_{x}^{2} + 2a_{x}x
(v2)_{x} = (v1)_{x} + a_{x}t
x2 = x1 + (v1)_{x}t + 1/2a_{x}t^{2}
(v2)_{y}^{2} = (v1)_{y}^{2} + 2a_{y}y
(v2)_{y} = (v1)_{y} + a_{y}t
y2 = y1 + (v1)_{y}t + 1/2a_{y}t^{2}
What did you get for answers?PEZenfuego said:It makes sense now. thank you.