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Astrum
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Homework Statement
Ship A is 100 km west of ship B. Ship A is moving at 35 km/h (west), ship B is moving at 25 km/h (north). Find the rate of change of the distance between the two ships after 4 hours.
Homework Equations
The Attempt at a Solution
the distance between the two ships is shown by
[itex]a^{2}+b^{2}=c^{2}[/itex]
Am I right to assume:
[itex][\frac{ds_{a}}{dt}]^{2}+[\frac{ds_{b}}{dt}]^{2}=[\frac{ds_{c}}{dt}]^{2}[/itex]
So, I need to find the rate of change of C? After 4 hours, the ships are 260 km apart.
I need a helping hint.
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