The Mass in the Figure Below Slides on a Frictionless

question 19

Multiple Choice

The mass in the figure below slides on a frictionless surface. When the mass is pulled out, spring 1 is stretched a distance x1 from its equilibrium position and spring 2 is stretched a distance x2. The spring constants are k1 and k2, respectively. The force pulling back on the mass is ​
​
​

• A)−k2x1.
• B)−k2x2.
• C)−(k1x1 + k2x2).
• D) .
• E) .

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