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Homework Statement
Homework Equations
xcxcxcxcxcxcxcxcxcxcxc[/B]
The Attempt at a Solution
My attempt:
Let displacement of A be x m,
Let displacement of B be y m, and
Let displacement of C be z m.
Step2: [/B]a+b+c+d=(a+xy)+(b+x)+c+(d+z)
2xy=z
Differentiating LHS and RHS components w.r.t dt:
d2x/dt  dy/dt = dz/dt
2v_{x} v_{y}= v_{z}
205=z
15=z
z= 15m/s (In upwards direction. Is this what the ve sign means?)
Teacher's attempt:
Let displacement of A be x m,
Let displacement of B be y m, and
Let displacement of C be z m.
Step2: a+b+c+d=(a+xy)+(b+xy)+c+(d+z)
0=2x2y+z
Differentiating by dt on both sides:
2v_{y}2v_{x}= v_{z}
1020=v_{z}
10=v_{z}
v=10m/s
Please tell why is my attempt wrong (In step two)
Thank you for reading.
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