Three boxes of masses m, 2m, and 3m are connected as shown in FIGURE 6-52. A force
Question:
Three boxes of masses m, 2m, and 3m are connected as shown in FIGURE 6-52. A force is applied to accelerate the boxes toward the right.
(a) Rank the tensions in the ropes, T1, T2, and T3, from smallest to largest, when the boxes are in motion and there is no friction between the boxes and the horizontal surface.
(b) Rank the tensions in the ropes, from smallest to largest, when the boxes are in motion and there is a coefficient of kinetic friction μk between the boxes and the horizontal surface.
T1 Вох 1 FRAGILE T2 2m FRAGILE Вох 2 T3 Зт т Вох 3 AвA
Step by Step Answer:
Use Newtons second law for each individual box to determine the ranking of the te...View the full answer
Related Video
Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.
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