Questions and Answers
Force is based upon both mass and acceleration.
True
What distinguishes mass from weight?
Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity on the object.
Where would a balance NOT function correctly?
In a zero gravity environment.
What distinguishes the three different classes of levers found in the human body?
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Second and third class levers both have the fulcrum at one end of the lever.
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What is the difference between velocity and acceleration?
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Why is the elbow considered a third class lever?
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The first class lever is the most common lever in the human body.
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Which of the following is NOT a component of a lever?
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The ankle is a third class lever.
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Study Notes
Force and Mass
- Force is determined by the product of mass and acceleration.
- Weight differs from mass; weight is the gravitational force acting on an object.
Balance and Gravity
- A balance measures mass using known weights.
- Balances do not operate correctly in a zero gravity environment.
Levers in the Human Body
- Levers are classified based on the arrangement of their components: load, effort, and fulcrum.
- Second and third class levers both have the fulcrum positioned at one end.
- The elbow acts as a third class lever since the effort is closer to the fulcrum than the load.
Velocity vs. Acceleration
- Velocity measures the speed of an object's movement.
- Acceleration refers to the rate at which an object's velocity changes.
Types of Levers
- The first class lever is considered the most common type in the human body, though specific examples weren't provided.
- Components of a lever include load, effort, and fulcrum; tension is not a component.
Specific Levers
- The ankle also functions as a third class lever, similar to the elbow.
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Description
Test your understanding of basic physics principles with this quiz. It covers key concepts such as force, mass, weight, and the functioning of balances. Perfect for students looking to reinforce their knowledge in physics.
