{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# The llble is attached to a spring with spring

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: d of the Problem 24. A child is on a swing whose 3.2-m-Iong chains make a maximum angle of 500 with the vertical. What is the child's maximum speed? ~4e plane? C;~sumeno change in gravitational potential )i;y,Kinitial Solution This is precisely the situation described in Example 8-6(a). Thus, V = J2g(1 - cas 00) = V2(9.8 m/s2)(3.2 m)(lcos 50) = 4.73 m/s . == ~mv2 = Ufinal = ~kX2, or V = thx. Thus, 11 = J(40,OOO N/m)/(lO,OOO kg) x . CJ:llJ = 50 m/s. Problem t;Aspring of constant k, compressed a distance x, is '{lise<! to launch a mass m up a frictionless slope {that makes an angle 0 with the horizontal. Find ran expression for the maximum distance along the ; ;slope that the mass moves after leaving the spring. 25. With x - xo = h and a = g, Equation 2-11 gives the speed of an object thrown downward with initial speed Voafter it has dropped a distance h: v = JV5 + 2gh. Use conservation of energy to derive the same result. 128 CHAPTER 8 Solution Gravity is a conservative force, so for free fall near the Earth's...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online