find potential energy of a persm weighing 50 kg at height of 10 km . take g = 9ms-²
Answers
Answer:
Gravitational potential energy is given by the expression,
W = m g h
where,
h = Height above the ground = 10 m
m = Mass of the object = 50 kg
g = Acceleration due to gravity = 10 ms-2
W = 50 × 10 × 10 = 5000 J.
At half-way down, the potential energy of the object will be, begin mathsize 12px style 5000 over 2 space equals space 2500 space straight J end style
At this point, the object has an equal amount of potential and kinetic energy. This is due to the law of conservation of energy. Hence, half-way down, the kinetic energy of the object will also be 2500 J.
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Answer:
Specific Refraction. a parameter characterizing the electronic polarizability of a unit mass of a substance in the high-frequency electromagnetic field of a light wave. The specific refraction r of a substance is equal to the substance's molecular refraction R divided by its molecular weight M.