PHY 101 Chapter : Webassign.net Homework 5 Solutions.pdf
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2 Dec 2014
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, and the change in kinetic energy has been. While the motorcycle is in the air, only the conservative gravitational force acts on cycle and rider. Note that this answer gives the maximum height of the cycle above the end of the ramp, which is an unknown distance above the ground. Cos16. 0 ncos25. 0 2. 20 mfwfs 31. 9 jfw cos900nwns cos900gwmgs net31. 9 j0031. 9 jfngwwww 122iikem v 2222222006. 00 ms2. 00 ms40. 0 msixy vvv 12225. 75 kg40. 0 ms115 jike 122ffkem v 22222228. 50 ms5. 00 ms97. 3 msfxy vvv 12225. 75 kg97. 3 ms280 jfke 280 j115 j165 jfikeke 112222ffiimmgymmgy vv 2222235. 0 ms33. 0 ms6. 94 m229. 80 msiffiyyyg vv221122bbaammgymmgy vv or. 5. 44 (a) choose peg = 0 at the level of the bottom of the arc. The child"s initial vertical displacement from this level is. In the absence of friction, we use conservation of mechanical energy as. , which gives (b) with a nonconservative force present, we use or. Thus, 15. 7 j of energy is spent overcoming friction.