In the first figure, a block of mass m lies on a horizontal frictionless surface

Question

In the first figure, a block of mass m lies on a horizontal frictionless surface and is attached to one end of a horizontal spring (spring constant k) whose other end is fixed. The block is initially at rest at the position where the spring is unstretched (x = 0) when a constant horizontal force in the positive direction of the x axis is applied to it. A plot of the resulting kinetic energy of the block versus its position x is shown in the second figure. The scale of the figure's vertical axis is set by Ks= 7.0 J. (a) What is the magnitude of

Explanation / Answer

At x = 1,

Equating work done and energy

6+k/2 = F*1

at x = 2,

Equating forces since body is at rest.

2*k = F

SOlving, K = 2.4 N/m

F = 4.8N

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.