Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 5 Solutions
Physics for Scientists and Engineers
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- A block is placed on a wooden plank, which is initially horizontal. One end of the plank is slowly raised to make it more and more inclined, and for a while the block stays in place on the plank and doesn't slide due to static friction. Finally, when the plank reaches an incline of 56.3oabove horizontal, the block begins to slide. What is the coefficient of static friction between the block and the plank?arrow_forwardAn object of mass 3 kg moves towards the negative x axis with a constant speed of 8 m/s and the coefficient of kinetic friction of the object with the ground is 0.39, so the value of the net force on the box is: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 block of mass M is pulled by a force T at an angle theta about the horizontal and moves at constant speed over a rough surface (with friction) .The magnitude of the friction force is:arrow_forwardYou are holding a book of mass 10.7 kg that is initially at rest against a vertical wall by exerting a force of magnitudeF Yb = 100.8 N at an angle of θ = 34.7 degrees, as indicated in the figure.If the coefficients of friction between the book and the wall are μs = 0.46 and μk = 0.36, find the magnitude of thefrictional force from the wall on the book.arrow_forwarda block of mass m is held stationary on a ramp by the frictional force on it from the ramp. A force , directed up the ramp, is then applied to the block and gradually increased in magnitude from zero. During the increase, what happens to the direction and magnitude of the frictional force on the block?arrow_forward
- The coefficient of static friction between a block of mass m and an incline is = 0•3. (a) What can be the maximum angle e of the incline with the horizontal so that the block does not slip on the plane ? (b) If the incline makes an angle 8/2 with the horizontal, find the frictional force on the block.arrow_forwardA block of mass 4.20 kg is pushed up against a wall by a force P that makes an angle of θ = 50.0°angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.270.arrow_forwardA 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.arrow_forward
- A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle 40 with the horizontal . The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a) the frictional force on the block from the floor and (b) the block’s acceleration.arrow_forwardThe coefficient of kinetic friction between a box and the floor is u, = 0.16 and the coefficient of static friction is u, = 2.0µ. (a) Calculate the ratio of static to kinetic friction force if m = 9 kg. (b) Will the ratio change if the value of m is changed but u, still equals 2.0µ? Yes Noarrow_forwardA block with a mass m is pushed up an inclined rough surface by a horizontal force F as shown. If the block is being pushed up at a constant speed, find the magnitude of the applied force F, given that theta =35 degrees , m = 5 kg, and the kinetic frictional coefficient between the block and the inclined surface mu_k = 0.2arrow_forward
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