8-18. The 50-lb board is placed across the channel and a100-lb boy attempts to walk across. If the coefficient of staticfriction at A and B is , = 0.4, determine if he can makethe crossing; and if not, how far will he get from A before theboard slips?-d10 ftB

Weight of the board Weight of the boy Coefficient of friction at A and B Let,Frictional force at…

8-18. The 50-lb board is placed across the channel and 100-lb boy attempts to walk across. If the coefficient of stati friction at A and B is , = 0.4, determine if he can make the crossing; and if not, how far will he get from A before the board slips?

8-18. The 50-lb board is placed across the channel and 100-lb boy attempts to walk across. If the coefficient of stati friction at A and B is , = 0.4, determine if he can make the crossing; and if not, how far will he get from A before the board slips?

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.89RP: The woman is trying to move the crate of weight W by pulling on the rope at the angle to the...

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Question

8-18. The 50-lb board is placed across the channel and a
100-lb boy attempts to walk across. If the coefficient of static
friction at A and B is , = 0.4, determine if he can make
the crossing; and if not, how far will he get from A before the
board slips?
-d
10 ft
B

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