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Questions and Answers
What type of energy is stored when an object is raised to a certain height?
What is the result of increasing the height of an object in terms of force?
Which formula represents the work done against gravity to change the position of an object?
Which statement best describes the Law of Conservation of Energy?
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What is the SI unit of power?
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How is power calculated when given the total energy consumed and total time taken?
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Study Notes
Potential Energy
- When an object is raised to a certain height, gravitational potential energy is stored.
- This energy is dependent on the object's mass, gravitational acceleration, and height above a reference point.
Effect of Height on Force
- Increasing the height of an object results in an increase in gravitational potential energy.
- The force acting against gravity remains constant but the work done increases with height.
Work Done Against Gravity
- The formula representing the work done against gravity is:
Work = m × g × h
where "m" is mass, "g" is the acceleration due to gravity, and "h" is height.
Law of Conservation of Energy
- The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another.
- Total energy in an isolated system remains constant regardless of the processes occurring within the system.
SI Unit of Power
- The SI unit of power is the watt (W).
- One watt is defined as one joule of energy transferred per second.
Calculating Power
- Power can be calculated using the formula:
Power = Total Energy / Total Time - This represents the rate at which energy is consumed or transferred over a specified time period.
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Description
Test your knowledge on potential energy and work done against gravity when an object is raised to a certain height. Learn about the equations involved, such as W = F.s and W (P.E) = mgh. Explore the concepts of Kinetic and Potential Energy as well as the Law of Conservation of Energy.
