# A snowboarder drops from rest into a halfpipe of radius R and slides down its frictionless surface to the bottom (Fig. P7.28). Show that (a) the snowboarder’s speed at the bottom of the halfpipe is v = 2 gr ( Hint: Use conservation of energy), (b) the snowboarder’s centripetal acceleration at the bottom is a c = 2 g , and (c) the normal force on the snow-boarder at the bottom of the halfpipe has magnitude 3mg ( Hint : Use Newton’s second law of motion). Figure P7.28

### College Physics

11th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305952300

### College Physics

11th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305952300

#### Solutions

Chapter
Section
Chapter 7, Problem 28P
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