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Kinetic Energy | Physics for GCSE/IGCSE - Year 11 PDF Download
Kinetic Energy
- Energy stored in an object's kinetic store refers to the energy it possesses due to both its mass and velocity.
- Consequently, any object in motion possesses energy in its kinetic energy store.
- The calculation of kinetic energy employs the formula:
- EK = ½ × m × v2
- Here,
- EK represents the kinetic energy measured in joules (J),
- m denotes the object's mass in kilograms (kg), and
- v signifies the object's velocity in meters per second (m/s).
Solved Example
Example: What is kinetic energy, and what factors contribute to it?
Ans: Kinetic energy refers to the energy stored in an object's kinetic store, which arises from both its mass and velocity. Any object in motion possesses energy in its kinetic energy store. The calculation of kinetic energy utilizes the formula: EK = ½ × m × v2, where EK represents kinetic energy measured in joules (J), m denotes the object's mass in kilograms (kg), and v signifies the object's velocity in meters per second (m/s).
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FAQs on Kinetic Energy - Physics for GCSE/IGCSE - Year 11
| 1. What is kinetic energy? |  |
Ans. Kinetic energy is the energy an object possesses due to its motion. It is directly proportional to the mass of the object and the square of its velocity.
| 2. How is kinetic energy calculated? | |
Ans. The formula to calculate kinetic energy is KE = 0.5 * m * v^2, where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.
| 3. How does kinetic energy relate to potential energy? | |
Ans. Kinetic energy and potential energy are both forms of mechanical energy. Kinetic energy is the energy of motion, while potential energy is the energy an object has due to its position or state.
| 4. Can kinetic energy be negative? | |
Ans. Kinetic energy cannot be negative as it is a measure of energy due to motion, which is always positive. If an object is not in motion, its kinetic energy will be zero.
| 5. How does kinetic energy change when the velocity of an object changes? | |
Ans. Kinetic energy is directly proportional to the square of the velocity of an object. Therefore, as the velocity of an object increases, its kinetic energy increases exponentially.
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Nov 22, 2024 Last updated |
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