height A bead slides without friction on a curved wire as shown in the figure ab

Question

height A bead slides without friction on a curved wire as shown in the figure above. If the height of point A relative to B is 1.25 m, then what is the speed of the bead when it reaches point B? Assume that the bead is at rest at point A. Incorrect 2.5 m/s Incorrect 25 m/s Incorrect 3.5 m/s Correct: 5 m/s Incorrect None of the above You are correct. Computer's answer now shown above. Your receipt no. is 163-1877 vious Tries How do the speeds at points B, D, F, and H compare'? None of the above Submit Answer Tries 0/2 How do the speeds at points C, E, and G compare? None of the above Submit Answer Tries 0/2

Explanation / Answer

First part:

Speed of the bead at point B = v = sqrt[2*g*h] = sqrt[2*9.81*1.25] = 4.95 m/s = 5.0 m/s

Last option is the correct answer.

Second Part:

Point B, D, F and H are on the same horizontal line. So at the same potential.

Therefore, V(B) = V(D) = V(F) = V(H)

So, third option is the correct answer.

Third Part:

Looking at the potential of the points C, E and G we find that -

V(C) > V(G) > V(E)

So, last option is the correct answer.

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