Question

The mass of a planet is 5 x 10 kg and its orbital velocity is 21900 m/s. Determine its kinetic energy ​

Answer 1

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ke= 1/2 mv^2

= 1/2 × 5×10×(21900)^2

=11990250000

Answer 2

Explanation:

mass of planet = 5×10²¹ Kg

Velocity of planet= 21900 m/s

Kinetic energy of planet=

$\frac{1}{2} m {v}^{2}$

$kinetic \: energy \: of \: planet = \frac{1}{2} \times 5 \times {10}^{21} \times 21900$

$= 1199025000 \times {10}^{21}$

$= 1199025 \times {10}^{24}$

= 1199025 YJ

Y- Yotta

$yotta = {10}^{24}$