Question

A cruise ship has a mass of 100,000,000 kg and a kinetic energy of 5,000,000 kJ. Calculate the speed of the cruise ship.

Answer 1

Explanation:

K.E = 5,000,000 KJ

MASS = 100,000,000 Kg

K.E = 1/2 MV^2

$5000000 = \frac{1}{2} \times 100000000 \times v {}^{2}$

$5000000 = 50000000 \times v {}^{2}$

$v {}^{2} = \frac{5000000}{50000000}$

$v {}^{2} = \frac{5}{50}$

therefore

$v {}^{2} = \frac{1}{10}$

$v = \sqrt{0.1}$

v = 0.316 m/s^2