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Question
Sania, a high-board diver of mass 50 kg is diving from a height of 30 m into a pool (see figure given). What is the potential energy of Sania at point A ? (g=10ms−2)
Sania, a high-board diver of mass 50 kg is diving from a height of 30 m into a pool (see figure given). What is the potential energy of Sania at point A ? (g=10ms−2)
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Solution
The correct option is C 15000J
Potential energy is energy stored in an object. This energy has the potential to do work. Gravity gives potential energy to an object. This potential energy is a result of gravity pulling downwards. The gravitational constant, g, is the acceleration of an object due to gravity. This acceleration is about 9.8meters per second on earth. The formula for potential energy due to gravity is PE=mgh. As the object gets closer to the ground, its potential energy decreases while its kinetic energy increases.
In this case, the mass is 50kg, height is 30m and the gravitational acceleration g=10m/s2.
PE=50×30×10=15000J.
Hence, the potential energy of Sania at point A is 15,000 J.
Potential energy is energy stored in an object. This energy has the potential to do work. Gravity gives potential energy to an object. This potential energy is a result of gravity pulling downwards. The gravitational constant, g, is the acceleration of an object due to gravity. This acceleration is about 9.8meters per second on earth. The formula for potential energy due to gravity is PE=mgh. As the object gets closer to the ground, its potential energy decreases while its kinetic energy increases.
In this case, the mass is 50kg, height is 30m and the gravitational acceleration g=10m/s2.
PE=50×30×10=15000J.
Hence, the potential energy of Sania at point A is 15,000 J.
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