When a mass on a spring is at maximum displacement, what quantity is at a minimum? a. acceleration b. velocity c. net force d. amplitude

B) Velocity

Explanation:

A mass on a spring displaced by small amplitude executes SHM (Simple Harmonic Motion) .

For a SHM

Amplitude ,

Velocity , v(t)= Aw \cos (wt )

Acceleration ,

Net Force,

where A = amplitude , w= angular velocity , t= time

From above equations for amplitude to be maximum

and for  

Thus when amplitude is maximum velocity is zero (minimum value)

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the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer