A 58.2-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.764 and 0.293, respectively. What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across the dock at a constant speed? (a) Number Units (b) Number Units
A 58.2-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.764 and 0.293, respectively. What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across the dock at a constant speed? (a) Number Units (b) Number Units
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Transcribed Image Text:A 58.2-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.764 and 0.293, respectively.
What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across the dock at a constant speed?
(a) Number
Units
(b) Number
Units
Transcribed Image Text:A block is pressed against a vertical wall by a force F. as the drawing shows.
This force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. The magnitude
of the force is different in the two cases, while the directional angle is the same. Kinetic friction exists between the block and the
wall, and the coefficient of kinetic friction is 0.330. The weight of the block is 56.0 N, and the directional angle for the force F is 8
= 44.0%. Determine the magnitude of F when the block slides (a) up the wall and (b) down the wall.
(a) P=
(b) P= i
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