Chapter 11341*P11.44(a)KUsAsB+=+bg012022986301112+===mgymvvgyABBA...±ms±m2ej(b)Lmvr=×⋅765 32 103kg 11.1 m s 6.3 mkg ms2.toward you along the axis of thechannel.(c)The wheels on his skateboard prevent any tangential force from acting on him. Then notorque about the axis of the channel acts on him and his angular momentum is constant. Hislegs convert chemical into mechanical energy. They do work to increase his kinetic energy.The normal force acts forward on his body on its rising trajectory, to increase his linearmomentum.(d)vr=v=×⋅=532 107612 03..kg mskg 5.85 mms2(e)W KUgBgC++=+127601276765 444 693351 0822kg 11.1 m skg 12.0 m skg 9.8 m s 0.45 mkJkJJkJ2++ =+=−+=WW.(f)gCgD+1276012767653422kg 12.0 m skgkg 9.8 m s 5.85 m
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