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Potential Energy of an Object at a Height

Convert 1 km ...

Question

Convert 1 km /hour into a metre per second.

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Solution

$C o n v e r s i o n o f 1 k m / h r t o m / s e c : 1 k m = 1000 m 1 h o u r = 3600 s e c$
Inserting values, we get
$1 k m / h r = \frac{1000}{3600} = \frac{5}{18} m s^{- 1}$

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