A skateboarder is practicing on the \"half-pipe\" shown in the figure below, usi

Question

A skateboarder is practicing on the "half-pipe" shown in the figure below, using a special frictionless 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?
m/s

(b) If the skateboarder has mass

m = 60 kg,

what is her apparent weight at the bottom of the half-pipe?
N

(c) What speed does she then have when she reaches the top edge on the other side of the half-pipe?
m/s

(d) Now suppose she has a speed of 15 m/s at the bottom of the half-pipe. What is the highest point she can reach? Hint: This point may be above the edge of the half-pipe. (Enter the distance from the bottom of the half-pipe.)
m

A skateboarder is practicing on the half-pipe shown in the figure below, using a special frictionless 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? m/s (b) If the skateboarder has mass m = 60 kg, what is her apparent weight at the bottom of the half-pipe? N (c) What speed does she then have when she reaches the top edge on the other side of the half-pipe? m/s (d) Now suppose she has a speed of 15 m/s at the bottom of the half-pipe. What is the highest point she can reach? Hint: This point may be above the edge of the half-pipe. (Enter the distance from the bottom of the half-pipe.) m

Explanation / Answer

1)
(Potential energy at highest point) = (Kinetic energy at lowest point)
m ? g ? h = m ? v

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