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Questions and Answers
What is meant by the term mechanical advantage?
What is meant by the term mechanical advantage?
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system.
The most common lever in the human body is the __________.
The most common lever in the human body is the __________.
- Second class lever
- First class lever
- Third class lever (correct)
- Fourth class lever
Why is a seesaw closest in arrangement to a first class lever?
Why is a seesaw closest in arrangement to a first class lever?
The seesaw has the fulcrum between the load and effort.
What tissue connects muscles to bones?
What tissue connects muscles to bones?
To overcome an object's inertia, it must be acted upon by __________.
To overcome an object's inertia, it must be acted upon by __________.
What is kinetic energy?
What is kinetic energy?
What distinguishes first class levers from second and third class levers?
What distinguishes first class levers from second and third class levers?
How does Newton's law of inertia describe the motion of objects?
How does Newton's law of inertia describe the motion of objects?
The neck is a __________.
The neck is a __________.
Explain the difference between mass and weight for objects on Earth and on the Moon.
Explain the difference between mass and weight for objects on Earth and on the Moon.
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Study Notes
Mechanical Advantage
- Mechanical advantage measures force amplification via tools, devices, or machines.
Types of Levers
- Human body predominantly utilizes third class levers.
First Class Levers
- A seesaw exemplifies a first class lever with the fulcrum positioned between load and effort.
Connective Tissues
- Tendons connect muscles to bones, enabling movement.
Overcoming Inertia
- An object’s inertia is overcome by an external force.
Kinetic Energy
- Kinetic energy is the energy an object possesses due to its motion.
Lever Classification
- First class levers differ from second and third class levers by having the fulcrum between load and effort, whereas others position both on one side.
Newton's Law of Inertia
- Newton's first law states that an object's velocity remains unchanged without an external force, demonstrating that objects at rest stay at rest, and those in motion continue in motion.
Neck as a Lever
- The neck functions as a first class lever in the human body.
Mass vs. Weight
- Mass reflects the amount of matter in an object and is constant regardless of location.
- Weight measures the gravitational pull on an object; it varies between Earth and the Moon, with objects weighing more on Earth due to stronger gravity.
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