A train travels 55 km south along a straight track in 34 minutes. What is the train's average velocity in kilometers per hour?
2 answers:
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As stated in the statement, we will apply energy conservation to solve this problem.
From this concept we know that the kinetic energy gained is equivalent to the potential energy lost and vice versa. Mathematically said equilibrium can be expressed as
Where,
m = mass
= initial and final velocity
g = Gravity
h = height
As the mass is tHe same and the final height is zero we have that the expression is now:
Hence the force is 80 N
