67. A sled and rider, weighing 30 lb and 150 lb, respectively, travel down a smooth slope that has the shape shown. If the rider does not hold on to the sides of the sled, determine the normal force which he exerts on the sled when the sled is (a) at point B, where it has a velocity of 15 ft/s, and (b) at some point C in mid air. dome 20 ft 20 ft y A y = 20 cos x -20 ft- -20 ft1 B C

67. A sled and rider, weighing 30 lb and 150 lb, respectively, travel down a smooth slope that has the shape shown. If the rider does not hold on to the sides of the sled, determine the normal force which he exerts on the sled when the sled is (a) at point B, where it has a velocity of 15 ft/s, and (b) at some point C in mid air. dome 20 ft 20 ft y A y = 20 cos x -20 ft- -20 ft1 B C

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Prob. 13-66
13-67. A sled and rider, weighing 30 lb and 150 lb,
respectively, travel down a smooth slope that has the shape
shown. If the rider does not hold on to the sides of the sled,
determine the normal force which he exerts on the sled
when the sled is (a) at point B, where it has a velocity of
15 ft/s, and (b) at some point C in mid air.
tog
20 ft
20 ft
y
A
-y = 20 cos
-20 ft-
EIS
4x
4
-20 ft-
B
X
C

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