(figure 1) is the potential-energy diagram for a 500 g particle that is released from rest at a.

The figure is the potential-energy diagram for a 500 g particlethat is released from rest at A. What are the particle's speeds atB, C, and D?

Answer

Well nevermind, I figured it out, but just in case anyone else everneeds help, I'll show what I did.

Ki + Ui = Kf + Uf

0 + Ui = 1/2mv2 + Uf

Ui = 1/2(.500)v2 +Uf

Ui = .250v2 + Uf

Speed at B

5 = .250v2 + 2
3/.250= v2

v = 3.46 m/s

The same for C,D, keeping Ui set at 5 and changingUf to 3, 0, respectively.


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