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33 votes
33 votes
Use the formula KE = 0. 5 mv2. What is the velocity of a platform diver if her kinetic energy is 12,000 J and her mass is

40 kg?

User Demosthenex
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1 Answer

19 votes
19 votes


\text{Kinetic energy,}\\\\~~~~E_k = \frac 12 mv^2\\\\\implies v^2 = \frac{2 E_k}m\\\\\implies v = \sqrt{\frac{2E_k}m}\\\\\implies v = \sqrt{(2 * 12000)/(40)}\\\\\implies v = 24.49~~ \text{ms}^(-1)\\\\\text{Velocity of the platform diver is 24.49 m/s}

User Vika
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