- #1
Mushroom79
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Homework Statement
An object moves so it's coordinates at the time t is given by the relationships
x = 25t
y = 20t-5t^2
What is the object's speed and direction at 3 sec?
t = 3 sec
Homework Equations
v = √(dy/dt)^2 / (dx/dt)^2
Pythagoras theorem
The Attempt at a Solution
dx=25
dy=20-10t
I'm not sure how I should use this by combining the two formulas above.