Given that the mass of the object is m = 75 kg and the height of the object is h = 15 m. The speed of the bike is v = 3 m/s
Also, the acceleration due to gravity is g = 9.8 m/s^2
The potential energy is given by the formula
[tex]P\mathrm{}E\text{. = mgh}[/tex]Substituting the values, the potential energy will be
[tex]\begin{gathered} P\mathrm{}E\mathrm{}=75\times9.8\times15 \\ =11025\text{ J} \end{gathered}[/tex]The kinetic energy of the bike is given by the formula,
[tex]\begin{gathered} K\mathrm{}E\text{. =}\frac{1}{2}mv^2 \\ =\frac{1}{2}\times75\times3^2 \\ =337.5\text{ J} \\ \approx338\text{ J} \end{gathered}[/tex]