College Physics II – Mechanics, Sound, Oscillations, and Waves

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Kinetic energy

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College Physics II – Mechanics, Sound, Oscillations, and Waves

Definition

Kinetic energy is the energy possessed by an object due to its motion. It depends on the mass and velocity of the object.

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5 Must Know Facts For Your Next Test

  1. Kinetic energy is given by the formula $KE = \frac{1}{2}mv^2$, where $m$ is mass and $v$ is velocity.
  2. Kinetic energy is a scalar quantity and has units of Joules (J).
  3. The work-energy theorem states that the work done on an object is equal to its change in kinetic energy.
  4. When velocity doubles, kinetic energy increases by a factor of four.
  5. Kinetic energy can be converted into other forms of energy, such as potential energy.

Review Questions

  • What is the formula for calculating kinetic energy?
  • How does doubling an object's velocity affect its kinetic energy?
  • Explain the work-energy theorem in relation to kinetic energy.

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