(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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

2. Relevant equations

v = √(dy/dt)^2 / (dx/dt)^2

Pythagoras theorem

3. 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.

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# Homework Help: Parametric equations, find speed and direction

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