Exercise 2-A block of mass 70 kg lies on a horizontal floor where the coefficient of static friction is 0.4. Draw a free-body diagram showing all the forces acting on the block and find the least force acting at an angle of 60° to the horizontal plane which can shift the block. [322.82 N]

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter5: More Applications Of Newton’s Laws
Section: Chapter Questions
Problem 12P: A block of mass 3.00 kg is pushed up against a wall by a force P that makes an angle of = 50.0 with...
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Please do exercise 2 only?
Cos e
9,8
Exercise 1-A block of mass 70 kg lies on a horizontal floor where the coefficient of static friction
is 0.4. Draw a free-body diagram showing all the forces acting on the block and find the least
horizontal force which can shift the block. [274.4 N]
Exercise 2-A block of mass 70 kg lies on a horizontal floor where the coefficient of static friction
is 0.4. Draw a free-body diagram showing all the forces acting on the block and find the least force
acting at an angle of 60° to the horizontal plane which can shift the block. [322.82 N]
Exercise 3-A frictional force of 540N keeps a box stationary on a sloping surface which has a
coefficient of static friction = 0.6.
(a)
Draw a free-body diagram of all the forces acting on the block.
Calculate:
(b)
The force exerted by the box on the surface. [900 N]
(c)
The angle of the slope. [31°]
(d)
The mass of the box. [107.1 kg]
Transcribed Image Text:Cos e 9,8 Exercise 1-A block of mass 70 kg lies on a horizontal floor where the coefficient of static friction is 0.4. Draw a free-body diagram showing all the forces acting on the block and find the least horizontal force which can shift the block. [274.4 N] Exercise 2-A block of mass 70 kg lies on a horizontal floor where the coefficient of static friction is 0.4. Draw a free-body diagram showing all the forces acting on the block and find the least force acting at an angle of 60° to the horizontal plane which can shift the block. [322.82 N] Exercise 3-A frictional force of 540N keeps a box stationary on a sloping surface which has a coefficient of static friction = 0.6. (a) Draw a free-body diagram of all the forces acting on the block. Calculate: (b) The force exerted by the box on the surface. [900 N] (c) The angle of the slope. [31°] (d) The mass of the box. [107.1 kg]
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