Answer:
Ea = 112500[J]
Eb = 87500[J]
Explanation:
To solve this problem we must use the principle of energy conservation which tells us that the energy of a body plus the work done or applied by the body equals the final energy of a body.
This can be easily visualized by the following equation:
[tex]E_{A}+E_{friction}=E_{B}[/tex]
Now we must define the energies at points A & B.
For point A
At point A we only have kinetic energy since it moves at 15 [m/s]
So the kinetic energy
[tex]E_{A}=\frac{1}{2}*m*v_{A}^{2} \\E_{A}=\frac{1}{2} *1000*(15)^{2} \\E_{A}=112500[J][/tex]
The final kinetic energy can be calculated as follows:
[tex]112500-25000=E_{B}\\E_{B}=87500[J][/tex]
