megbra251 megbra251

04-02-2021
Physics

contestada

A spring has a spring constant of 800 N/m. How much work must be done to stretch the spring 0.4 m from its unstretched position?
A. 64.0 J
B. 160.0 J
C. 320.0 J
D. 640.0 J

Respuesta :

quasarJose quasarJose

05-02-2021

Answer:

A. 64.0 J

Explanation:

Given parameters:

Spring constant = 800N/m

Extension = 0.4m

Unknown:

Work done = ?

Solution:

The work done in a string is given as:

Work done = [tex]\frac{1}{2}[/tex] x 800 x 0.4² = 64J

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