Three Kids Pull on a Toy

question 69

Multiple Choice

Three kids pull on a toy. Kim pulls with a force of 30 N north, Jim pulls with a force of 30 N south, and Tim pulls with a force of 15 N east. The acceleration of the toy is

• A)10 m/s².
• B)15 m/s².
• C)33 m/s²
• D)need more information

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Definitions:

Gamma Motor Neurons

Neurons that control the sensitivity of muscle spindle fibers to stretch, thereby adjusting the tension of muscles.

Muscle Spindles

Sensory receptors within muscles that detect changes in muscle length and participate in regulating muscle contraction.

Alpha Motor Neurons

Nerve cells that connect to and control the contraction of skeletal muscles, playing a key role in initiating muscle movement.

Reflex Arc

The neural pathway that controls a reflex action, typically comprising a sensory receptor, a neural pathway, and an effector.