🔋college physics i – introduction review

key term - Mechanical advantage

Definition

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied. It quantifies how much a simple machine multiplies the input force.

5 Must Know Facts For Your Next Test

  1. Mechanical advantage (MA) can be calculated using MA = \frac{F_{out}}{F_{in}}, where $F_{out}$ is the output force and $F_{in}$ is the input force.
  2. In an ideal (frictionless) machine, mechanical advantage also equals the ratio of input distance to output distance: MA = \frac{d_{in}}{d_{out}}.
  3. Simple machines such as levers, pulleys, and inclined planes are designed to provide mechanical advantage.
  4. The efficiency of a machine is related to its mechanical advantage and can be less than 100\% due to energy losses like friction.
  5. A higher mechanical advantage means less input force is needed to perform the same amount of work.

Review Questions

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