Answer:
20.996 m
Explanation:
Given:
Initial velocity, 
Final velocity, 
Total time taken,
s.
∴ Acceleration is given as,
m/s²
Now, using Newton's equation of motion, we find the displacement.
Displacement is given as:

Plug in 0 for
, 4.91257 for
and 1.74 for
. Solve for
.
This gives,

Therefore, the train's displacement in the first 4.91257 s of motion is 20.996 m.
Answer:
The total mechanical energy is the sum of kinetic and potential energies: E = K + U. The law of conservation of total mechanical energy states that the sum of the kinetic energy and potential energy is constant in time.
Answer:
Maximum altitude above the ground surface is 2053 km.
Explanation:
See written workings in attached picture.