20. As shown in Figure AP8.20, a green bead ofmass 25 g slides along astraight wire. The lengthof the wire from point@ to point ® is 0.600 m,and point A is 0.200 mhigher than point . Aconstant friction force(BFigure P8.20of magnitude 0.025 0 N acts on the bead. (a) If thebead is released from rest at point @, what is its speedat point ®? (b) A red bead of mass 25 g slides along acurved wire, subject to a friction force with the sameconstant magnitude as that on the green bead. If thegreen and red beads are released simultaneously fromrest at point @, which bead reaches point 8 with ahigher speed? Explain.

Part a: The potential energy of the bead at point A is converted into kinetic energy at point B but…

As shown in Figure P8.20, a green bead of mass 25 g slides along a straight wire. The length of the wire from point @ to point ® is 0.600 m, and point @ is 0.200 m higher than point ®. A constant friction force Figure P8.20 of magnitude 0.025 0 N acts on the bead. (a) If the bead is released from rest at point O, what is its speed at point ®? (b) A red bead of mass 25 g slides along a curved wire, subject to a friction force with the same constant magnitude as that on the green bead. If the green and red beads are released simultaneously from rest at point @, which bead reaches point with a higher speed? Explain.

As shown in Figure P8.20, a green bead of mass 25 g slides along a straight wire. The length of the wire from point @ to point ® is 0.600 m, and point @ is 0.200 m higher than point ®. A constant friction force Figure P8.20 of magnitude 0.025 0 N acts on the bead. (a) If the bead is released from rest at point O, what is its speed at point ®? (b) A red bead of mass 25 g slides along a curved wire, subject to a friction force with the same constant magnitude as that on the green bead. If the green and red beads are released simultaneously from rest at point @, which bead reaches point with a higher speed? Explain.