A 3.0-kilogram object is placed on a frictionless track at point A and released from rest. (Assume the gravitational potential energy of the system to be zero at point C.)
- 4.0 m
m-3.0 kg
3.0 m
2.0 m
1.0 m
0.0 m
b. Calculate the kinetic energy of the object at point B. [Show all work, including the equation
and substitution with units.] [2]

Explanation:

From the given information:

The gravitational potential energy at A is:

GIven that:

mass(m) = 3

height (h) = 3

b)

Using the conservation of mechanical  energy:

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