contestada

A 0.38 kg mass is attached to a spring with a spring constant 106 N/m so that the mass is allowed to move on a horizontal frictionless surface. The mass is released from rest when the spring is compressed 0.109 m. Find the maximum force on the mass. Answer in units of N.

Respuesta :

Answer:11.55 N

Explanation:

Given

mass [tex]m=0.38 kg[/tex]

Spring constant [tex]k=106 N/m[/tex]

initial compression [tex]x=0.109 m[/tex]

mass will perform simple harmonic motion with general equation of motion given by

[tex]x=A\sin \omega t[/tex]

where [tex]x=Position\ of\ Mass [/tex]

[tex]A=maximum\ Amplitude[/tex]

[tex]\omega =Natural\ frequency\ of\ oscillation=\sqrt{\frac{k}{m}}[/tex]

[tex]\omega =16.70 rad/s[/tex]

[tex]t=time [/tex]

therefore acceleration is given by

[tex]a=-A\omega ^2\sin \omega t[/tex]

[tex]a_{max}=A\omega ^2[/tex]

initial compression is equivalent to max amplitude

thus [tex]A=0.109 m[/tex]

[tex]a_{max}=A\omega ^2=0.109\times (16.70)^2=30.405 m/s^2[/tex]

therefore Maximum Force [tex]F=ma_{max}[/tex]

[tex]F=0.38\times 30.405=11.55 N[/tex]

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