Respuesta :
Answer:
Energy needed = 1100 kJ
Explanation:
Energy needed = Change in kinetic energy
Initial velocity = 15 m/s
Mass, m = 1600 kg
[tex]\texttt{Initial kinetic energy = }\frac{1}{2}mv^2=0.5\times 1600\times 15^2=180000J[/tex]
Final velocity = 40 m/s
[tex]\texttt{Final kinetic energy = }\frac{1}{2}mv^2=0.5\times 1600\times 40^2=1280000J[/tex]
Energy needed = Change in kinetic energy = 1280000-180000 = 1100000J
Energy needed = 1100 kJ
The energy needed will be 1100KJ.
Kinetic Energy:
- It is the energy that it possesses due to its motion.
- It is given by formula:
[tex]K.E=\frac{1}{2}mv^2[/tex]
Energy needed = Change in kinetic energy
Given:
Initial velocity = 15 m/s
Final velocity = 40 m/s
Mass, m = 1600 kg
Substituting the values in the above formula:
1. Calculating for Initial K.E:
[tex]\text{Initial K.E}=\frac{1}{2}*1600*15^2\\\\ \text{Initial K.E}=180,000J[/tex]
2. Calculating for Final K.E:
[tex]\text{Final K.E} =\frac{1}{2}*1600*40^2\\\\\text{Final K.E} = 1,280,000J[/tex]
Energy needed is the change in the kinetic energy.
Thus, the Energy needed will be:
[tex]\text{Energy needed}=1280000J-180000J\\\\\text{Energy needed}=1100000J\\\\\text{Energy needed}=1100KJ[/tex]
Find more information about Kinetic energy here:
brainly.com/question/20658056
