For the system in Problem 12 and Figure P4.12, how large can m 2 be made without
Question:
Data From Problem 12
Two blocks of mass m1 = 45 kg and m2 = 12 kg are connected by a mass less string that passes over a pulley as shown in Figure P4.12. The coefficient of static friction between m1 and the table is µS = 0.45.
(a) Will this system be in static equilibrium? Assume the pulley is friction less.
(b) Find the tension in the string.
Figure P4.12
т1 т2
Step by Step Answer:
See the solution to Problem 412 There we found m 2 s m 1 in order for the system to be in transnatio...View the full answer
College Physics Reasoning and Relationships
ISBN: 978-0840058195
2nd edition
Authors: Nicholas Giordano
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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