Unformatted text preview: these forces compare with the weights of the object and the upper body? 3. Y&F 11.73 The farmyard gate. 4. A ladder 5.0 m long rests against a frictionless vertical wall with its lower end 3.0 m from the wall. The ladder weighs 160 N. The coefficient of static friction between the foot of the ladder and the ground is 0.40. A man weighing 740 N climbs slowly up the ladder. (a) What is the maximum frictional force that the ground can exert on the ladder at its lower end? (b) What is the actual frictional force when the man has climbed 1.0 m along the ladder? (c) how far along the ladder can the man climb before it starts to slip? 5. Y&F 11.77 Box on a conveyor belt. 6. Y&F 13.7 Mass and spring. 7. Y&F 13.15 Weighing an astronaut in space. 8. Y&F 13.18 Mass and spring. Also draw a graph of v x ( t ) as a function of time, over two periods....
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 Spring '07
 LECLAIR,A
 Force, Friction, Work, maximum frictional force, lower end, frictionless vertical wall, actual frictional force

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