For the delivery truck shown:The mass of the truck is 4000 kg.The horizontal distance from the rear tires tothe center of mass, G, is L1 = 3 mThe vertical distance from the ground to G isd = 3mThe horizontal distance from the rear tires tothe front tires is L2 = 5 m.dThe delivery truck is traveling at 20 m/swhen the brakes are applied.The truck skids to a stop, so that the frictionforce is applied to the tires by the road.*The coefficient dynamic friction is uk = 0.60*If it did not skid, then the friction forcewould be between the brake pads and thebrake disc, which would be above the road.Calculate the distance that the truck travels before it stops.Use Σ MA = Ia + d x m*a for the following:'O'Calculate the left side of this equation: Σ MAGL1 →L2Calculate the right side of this equation: I*α + d x m*ad+ x m*a is from r x m*a (cross product), so, determine the sign by considering the cross product.Set the left and right right sides equal to each other and solve for NBCalculate the normal force on each of the rear tires and each of the front tires.

Answered: Image /qna-images/answer/55b9a808-2618-4fe8-9dac-2677110e4061.jpg

For the delivery truck shown: The mass of the truck is 4000 kg. The horizontal distance from the rear tires to the center of mass, G, is L1 = 3 m The vertical distance from the ground to G is d=3m The horizontal distance from the rear tires to the front tires is L2 = 5 m.

For the delivery truck shown: The mass of the truck is 4000 kg. The horizontal distance from the rear tires to the center of mass, G, is L1 = 3 m The vertical distance from the ground to G is d=3m The horizontal distance from the rear tires to the front tires is L2 = 5 m.

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 7.73P: The normal pressure acting on the disk of the sander is given by p=(4/3)+(r2/6), where p is the...

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Question

For the delivery truck shown:
The mass of the truck is 4000 kg.
The horizontal distance from the rear tires to
the center of mass, G, is L1 = 3 m
The vertical distance from the ground to G is
d = 3m
The horizontal distance from the rear tires to
the front tires is L2 = 5 m.
d
The delivery truck is traveling at 20 m/s
when the brakes are applied.
The truck skids to a stop, so that the friction
force is applied to the tires by the road.*
The coefficient dynamic friction is uk = 0.60
*If it did not skid, then the friction force
would be between the brake pads and the
brake disc, which would be above the road.
Calculate the distance that the truck travels before it stops.
Use Σ MA = Ia + d x m*a for the following:
'O'
Calculate the left side of this equation: Σ MA
G
L1 →
L2
Calculate the right side of this equation: I*α + d x m*a
d+ x m*a is from r x m*a (cross product), so, determine the sign by considering the cross product.
Set the left and right right sides equal to each other and solve for NB
Calculate the normal force on each of the rear tires and each of the front tires.

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