Answer:
[tex]\boxed {\boxed {\sf 1,881, 600 \ Joules}}[/tex]
Explanation:
Potential energy is the product of mass, gravitational acceleration, and height.
[tex]E_p= mgh[/tex]
The mass is 1600 kilograms and the height is 120 meters. Assuming this is on Earth, then the gravitational acceleration is 9.8 meters per square second.
[tex]m= 1600 \ kg\\g= 9.8 \ m/s^2 \\h= 120 \ m[/tex]
Substitute the values into the formula.
[tex]E_p= ( 1600 \ kg )( 9.8 \ m/s^2)( 120 \ m)[/tex]
Multiply the first two numbers.
[tex]E_p= 15680 \ kg*m/s^2 (120 \ m )[/tex]
Multiply again.
[tex]E_p= 1881600 \ kg*m^2/s^2[/tex]
[tex]E_p= 1881600 \ J[/tex]
The train's potential energy is 1,881,600 Joules.
