(11%) Problem 2: A mass is sliding on a frictionless surface with a speed v. It

Question

(11%) Problem 2: A mass is sliding on a frictionless surface with a speed v. It runs into a linear spring with a spring constant of k = 95 N/m, which compresses from position x to position x oheexpertt ted the front of the spring to be x-0. Grade Summa spring Potential eted eted Submissions Attempts remair (0% per attemp detailed view 1 2 3 eted 0 Submit Hint Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback. 25% Part (b) Select the equation that correctly describes the work done by the spring to stop the mass

Explanation / Answer

Part (a) -

The force that the spring exerts on the mass is given by -

F = -k * delta x

here, delta x = xf - xi

now if the spring starts from xi = 0

then delta x = xf - 0 = xf

So, we have -

F = -k*xf

This is the expression of the requisite force that the spring exerts on the mass.

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