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What is the SI unit of gravitational potential energy?
Watt
Joule
Newton
Pascal
Joule
The SI unit of gravitational potential energy is the Joule (J), which is equivalent to the unit of work (NewtonтЛЕmeter). Energy is a scalar quantity defined by the capacity to do work, and therefore it shares the same base units across all its forms.
The SI unit of gravitational potential energy is the Joule (J), which is equivalent to the unit of work (NewtonтЛЕmeter). Energy is a scalar quantity defined by the capacity to do work, and therefore it shares the same base units across all its forms.
Think of a heavy stone held high above the ground; the higher you lift it, the more energy you have 'invested' in it, which is then 'stored' as potential energy waiting to be released.
Remember 'W-E-J': Work, Energy, and Joules are all linked.
U=mgh тАФ Gravitational potential energy where m is mass, g is acceleration due to gravity, and h is height
1J=1kgтЛЕm2тЛЕsтИТ2 тАФ Dimensional definition of a Joule
Gravitational potential energy is the energy possessed by an object due to its position relative to a gravitational field. When an object of mass m is raised to a height h in a gravitational field g, the work done against gravity is stored as potential energy, calculated by the product of force (weight) and displacement (height).
Gravitational potential energy is a scalar quantity.
The SI unit Joule is derived from the base units of the International System of Units.
Energy is conserved in a closed system, converting between kinetic and potential forms.
Standardized SI unit simplifies physical calculations
Directly relates energy to force and displacement
Calculating the energy available in hydroelectric power dams
Estimating the energy required to lift heavy machinery in engineering
The Joule is named after the English physicist James Prescott Joule.
Option A (Watt) is the SI unit of power, Option C (Newton) is the SI unit of force, and Option D (Pascal) is the SI unit of pressure.
B is correct тАФ The Joule is the standard SI unit used to measure all forms of energy, including gravitational potential energy.
Always remember that any form of energy (kinetic, potential, thermal, electrical) will always have the Joule as its SI unit, distinguishing it from power (Watt) and force (Newton).
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