Front side air. A skateboarder is practicing on the “half-pipe†shown in Figure P6.39, using a special friction less skateboard. (You can also ignore the kinetic energy of the skateboard’s wheels.)
(a) If she starts from rest at the top of the half-pipe, what is her speed at the bottom?
(b) If the skateboarder has mass m = 55 kg, what is her apparent weight at the bottom of the half-pipe?
(c) What speed does she then have when she reaches the top edge on the other side of the half-pipe?
(d) Now suppose she has a speed of 11 m/s at the bottom of the half pipe. What is the highest point she can reach?
Figure P6.39
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