A Mass on a Spring Vibrates in Simple Harmonic Motion

question 23

Multiple Choice

A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm.If a timer is started when its displacement is a maximum (hence x = 8 cm when t = 0) ,what is the displacement of the mass when t = 3.7 s?

• A)zero
• B)0.025 m
• C)0.036 m
• D)0.080 m

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Definitions:

VARs

Volt-Ampere Reactive, a unit of reactive power in an AC electrical power system.

Three-Phase Connection

A method of electrical connection that uses three alternating currents of the same frequency and amplitude but with phases offset by one third of a cycle.

Windings

Coils of wire around a core in electrical devices, used to create magnetic fields or induce currents.

Wye

A configuration for connecting three-phase power where the phases are connected at a common point, forming a Y shape.