Explanation:
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
1. Mass, m = 5 kg
Speed, v = 2 m/s
[tex]K_1=\dfrac{1}{2}\times 5\times (2)^2\\\\=10\ J[/tex]
2. Mass, m = 71 kg
Speed, v = 1 m/s
[tex]K_2=\dfrac{1}{2}\times 71\times (1)^2\\\\=35.5\ J[/tex]
3. Mass, m = 71 kg
Speed, v = 5 m/s
[tex]K_3=\dfrac{1}{2}\times 71\times (5)^2\\\\=887.5\ J[/tex]
4. Mass, m = 1816 kg
Speed, v = 25 m/s
[tex]K_4=\dfrac{1}{2}\times 1816\times (25)^2\\\\=567500\ J[/tex]
