Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 5, Problem 10P
(a)
To determine
To Calculate: The
(b)
To determine
To Calculate: The coefficient of kinetic friction between the surface of the block and the table.
(c)
To determine
The frictional force acting on the upper block.
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A 2.20 kg block is initially at rest on a horizontal surface. A horizontal force of magnitude 4.83 N and a vertical force are then applied to the block (Fig. 6-17). The coefficients of friction for the block and surface are µs = 0.4 and µk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of is (a) 8.00 N and (b) 12.0 N. (The upward pull is insufficient to move the block vertically.)
Block A in Fig. 6-56 has mass mA = 4.0 kg, and block B has mass mB 2.0 kg.The coefficient of kinetic friction between block B and the horizontal plane is mk= 0.50.The inclined plane is frictionless and at angle u= 30°.The pulley serves only to change the direction of the cord connecting the blocks. The cord has negligible mass. Find (a) the tension in the cord and (b) the magnitude of the acceleration of the blocks.
A package is projected 10 m upward on a 15 ° inclined plane so that it reaches the top of the plane with zero velocity. Knowing that the coefficient of kinetic friction between the package and the incline is 0.15, determine the speed of the package when it returns to its original position.
Chapter 5 Solutions
Physics Fundamentals
Ch. 5 - Prob. 1QCh. 5 - Prob. 2QCh. 5 - Prob. 3QCh. 5 - Prob. 4QCh. 5 - Prob. 5QCh. 5 - Prob. 6QCh. 5 - Prob. 7QCh. 5 - Prob. 8QCh. 5 - Prob. 9QCh. 5 - Prob. 10Q
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- The figure shows an overhead view of a 0.026 kg lemon half and two of the three horizontal forces that act on it as it is on a frictionless table. Force F has a magnitude of 3N and is at e, - 31. Force F2 has a magnitude of 10 N and is at 02- 33". In unit-vector notation, what is t third force if the lemon half (a) is stationary, (b) has the constant velocity V (137-14) m (12h- 14) m/s?, where t is time? %3D and (c) has the V = %3Darrow_forwardOn a horizontal plane a block of mass m = 0.30 kg is placed and initially held at rest. To this block a massless string is attached and it initially keeps another block of mass M = 0.50 kg vertically at rest via a fixed pulley as shown in Figure. The coefficient of kinetic friction between the block m and the plane is Pk -0.25, but the friction between the block M and the vertical wall is zero. Calculate the tension T by string in N. (Hint: First calculate the acceleration of m or M. And set up the equation of motion for M to find the tension T.) T m Marrow_forwardA 4.10 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 40.0 N. Figure 6-30 gives the block’s speed v versus time t as the block moves along an x axis on the floor. The scale of the figure’s vertical axis is set by vs 5.0 m/s. What is the coefficient of kinetic friction between the block and the floor?arrow_forward
- NEWTON'S LAWS WITH FRICTION PH 421 5 0 A 2.5 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 6.0 N and a vertical force P are then applied to the block (Fig. 6-17). The coefficients of friction for the block and surface are M, magnitude of the frictional force acting on the block if the magni- tude of P is (a) 8.0 N, (b) 10 N, and (c) 12 N. = 0.40 and H = 0.25. Determine the %3D N. F. Flg. 6-17 Problem 5.arrow_forwardTo avoid a collision while traveling at a speed of 19 m/sec and descending a steep mountain pass with a grade of 4.3%, a truck locks up all wheels and skids to a stop over a distance of 90 meters. Determine the coefficient of friction between the truck tires and pavement.arrow_forwardA particle of mass 0.5 kg is at rest on a rough plane inclined at an angle to the horizontal where sin = 3/5. The particle is just prevented fromsliding from the plane by a force of 2 N applied in an upward directionparallel to a line of the greatest slope of the plane.(a) Draw a figure showing all the forces acting on the particle. (b) Calculate the coefficient of friction between the particle and theplane.(c) Calculate by how much the force of 2 N must be increased so thatthe particle is about to move up the plane.arrow_forward
- A 3.00-kg block starts from rest at the top of a 30.0° inclineand slides 2.00 m down the incline in 1.50 s. Find (a) theacceleration of the block, (b) the coefficient of kinetic frictionbetween the block and the incline, (c) the frictional force actingon the block, and (d) the speed of the block after it hasslid 2.00 m.arrow_forwardA block of mass M slides down a frictionless plane inclined at an angle 0 with the horizontal. the normal reaction force exerted by the plane on the block ?arrow_forwardA particle of mass 4kg rests on the surface of a rough plane which is inclined at 25 to the horizontal. It is connected by a light inextensible string passing over a light smooth pulley at the top of the plane, to a particle of mass 5kg which is hanging freely. If the coefficient of 1 friction between the4kg mass and the plane is 4 (a) Draw a diagram to represent the given information; (b) find (i) the acceleration of the system when it is released from rest; (11) the tension in the string: (i11) the force exerted by the string on the pulley.arrow_forward
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