s attached to one end of a string. The other end of the string is attached ll is

Question

s attached to one end of a string. The other end of the string is attached ll is released at A and swings in a vertical arc to points B, C, and D, as s t air resistance and use g 10 m/s2. At point the bea at pointthe bead has the most kinetic energy. ce and use g = 10 m/s2. At point-_ the bead has the mos B) B, D C) A, D D) A, C E) C Figure 13 10 PE 8 (J) 61 4 Position 4 along the x axis. The potential energy curve as a function of ere is no friction (the system is conservative). If the speed of t uill be its sneed at 4.0 m along the +x-axis? ng D 10 m/s

Explanation / Answer

Points B,D : Max Potential Energy

Point C: Max Kinetic Energy

KEf= PEi + KEi

1/2mvf^2 = PEi + 1/2mvi^2

1/2*2*vf^2 = 10 + 1/2*2*4.0^2 =>       vf= 5.1 m/s

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