Which Statement Regarding Levers in Movement Is True

question 19

Multiple Choice

Which statement regarding levers in movement is true?

• A) An axis of movement and a single source of force are required to establish a lever.
• B) For a basic lever, usually there are two external or two internal forces.
• C) In the human body, levers usually involve a single force and axis of motion.
• D) Levers are utilized in the body when an external force is countered or controlled by muscle force.

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Definitions:

Judgmental Sampling

A non-random sampling technique where the researcher selects units to be sampled based on their knowledge and professional judgment.

Network Sampling

A method of sample selection used in research that involves choosing participants through networks or connections within a specific population.

Stratified Random Sampling

Sampling in which randomly selected units from small or minority populations are forced into the sample to ensure that they are represented in proportion to their presence in the population.

Purposive Sampling

A non-random sampling technique in which the researcher selects participants based on specific characteristics or qualities.