Question

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?

Answer 1

`\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}`