PHYSICS F/SCIEN.+ENGRS. W/SAPLING >IC<
6th Edition
ISBN: 9781319336127
Author: Tipler
Publisher: MAC HIGHER
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Chapter 4, Problem 80P
To determine
The tension in the string and the acceleration of each block.
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Chapter 4 Solutions
PHYSICS F/SCIEN.+ENGRS. W/SAPLING >IC<
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- When a force of 15 newtons is applied to the 0.50 kg book, the friction keeps the book from sliding down the wall. What is the minimum force and minimum coefficient of friction to keep the book from sliding?arrow_forwardIn the figure, the coefficient of kinetic friction between the block and inclined plane is 0.23, and angle 0 is 53º. (a) What is the acceleration (including sign) of the block if the block is sliding down the plane? Take the direction down the plane to be the positive direction. (b) What is the acceleration (including sign) of the block if the block is sliding up the plane? Take the direction down the plane to be the positive direction. (a) Number Units (b) Number Unitsarrow_forwardTwo blocks are joined by an inextensible cable as shown. The mass of block A is 159.1 kg and the mass of block B is 288.6 kg. If the system is released from rest, determine the acceleration (in m/s2 ) of block B. Assume that the coefficient of friction between block A and the plane is μk = 0.44 and that the pulley is weightless and frictionless. Round off only on the final answer expressed in 3 decimal places. Use g = 9.81 m/s2arrow_forward
- Karev is lowering two boxes, one on top of the other, down the ramp, as shown in the figure, by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 15 cm/s. The coefficient of kinetic friction between the ramp and the lower box is 0.444, and the coefficient of static friction between the two boxes is 0.800. (b) What are the magnitude of the friction force on the upper box?arrow_forwardTwo blocks connected by a string are pulled across a horizontal surface by a force applied to one of the blocks, as shown. The coefficient of kinetic friction between the blocks and the surface is 0.25. If each block has an acceleration of 2.0 m/s2to the right, what is the magnitude F of the applied force?arrow_forwardA car drives onto a section of the road which is covered in ice. The driver attempts to stop by hitting the brakes but the wheels lock and the car skids for another 60 m. Determine the coefficient of kinetic friction between the wheels and the ice if the initial speed of the car was 40 km/hr.arrow_forward
- A block of mass m1 = 3.9 kg is placed on top of a block with mass m2 = 5.4 kg. A force, F = is applied to m2, at an angle 16.1 degrees above the horizontal. If the coefficient of static friction between all moving surfaces is 0.42 and the coefficient of kinetic friction is 0.32, determine the magnitude of the minimum force that will get the blocks moving.arrow_forwardA skater with an initial speed of 5.90m/s stops propelling himself and begins to coast across the ice, eventually coming to rest. Air resistance is negligible. (a) The coefficient of kinetic friction between the ice and the skate blades is 0.125. Find the deceleration caused by kinetic friction. (b) How far will the skater travel before coming to rest?arrow_forwardA team of dogs pulls a sled of mass 2m with a force . A second sled of mass m is attached by a rope and pulled behind the first sled. The tension in the rope is . Assuming frictional forces are too small to consider, determine the ratio of the magnitudes of the forces and , that is, P/T.arrow_forward
- The diagram shows a block of mass m = 2.50 kg resting on a plane inclined at an angle of 0 = 30° to the horizontal. The coefficient of static friction between the block and the plane is Ustatic = 0.135, and the block is stationary but just on the point of sliding up the slope. 3 X E Fi D maximum magnitude of applied force = 3 N x' mg Fi The diagram shows the four forces acting on the block: an applied force F₁ acting up the slope, the block's weight mg, the normal reaction force N and the force of static friction, Ff. In this case, the force of static friction acts down the slope, opposing the tendency of the block to move up the slope. Find the the maximum magnitude of the applied force F₁ that can be exerted if the block is to remain stationary. Specify your answer by entering a number into the empty box below. 0 N.arrow_forwardAn athlete pulls a box E of mass m = 70kg down an incline, as shown. The coefficients of friction between the box and the incline are us-0.40 and uk-0.30. Consider particle analysis of the instant when the force used to pull is 300N. Let 8 = 300 and a = 120. Use the indicated coordinate axes. ala E 0 What is the magnitude of the component of the weight PARALLEL to the incline - i.e., along x-axis?arrow_forwardA 2.50 kg mass is released from rest while on and incline of 54.7 degrees. If the coefficient of kinetic friction is 0.529, what is the magnitude of the acceleration of the mass?arrow_forward
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