Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Textbook Question
Chapter 7, Problem 4PLA
To measure the coefficient of kinetic friction by sliding a block down an inclined plane the block must be in equilibrium. What experimental condition must you try to accomplish that will assure you that the block is in equilibrium?
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Students have asked these similar questions
A rope exerts a force of 50 N on a box to keep it stationary. If the box is on a plane inclined 25° from the horizontal and the coefficient of static friction is 0.29, calculate the normal force exerted on the box.
To measure the coefficient of kinetic friction by sliding a block down an inclined plane the block mustbe in equilibrium. What experimental condition must you try to accomplish that will assure you thatthe block is in equilibrium?
If rope BC will fail when the tension becomes 45 kN, determine the greatest vertical load Fthat can be
applied to the beam at B. What is the magnitude of the reaction at A for this loading? Neglect the
thickness of the beam.
26 kN
F
C
13
12
B
2 m
4 m
Chapter 7 Solutions
Physics Laboratory Manual
Ch. 7 - For kinetic friction the direction of the...Ch. 7 - The two coefficients of friction discussed in this...Ch. 7 - Suppose a block of mass 25.0 kg rests on a...Ch. 7 - To measure the coefficient of kinetic friction by...Ch. 7 - A 5.00 kg block rests on a horizontal plane. A...Ch. 7 - Both types of coefficient of friction are...Ch. 7 - For either type of coefficient of friction, what...
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- Problem-solving questions At the back of the leg, two muscles pull on the Achilles tendon to create an upward force. Estimate the nett force if cach muscle has a diameter of about 5.0 mm and exerts a force in a direction of 25° from the vertical. (Use a force per unit area of muscle of 7x10° N/m²). An 18 kg penguin slides down an iceberg at an angle of 15° to the horizontal. Friction between the penguin's body and the ice surface is negligible. Determine the normal force acting on the penguin and its acceleration down the iceberg. A manufacturer of children's slides does some tests and discovers that the slope of a slippery slide must be at least 25° to the horizontal for the slide to work. The child involved in doing the testing weighs 35 kg. What is the coefficient of static friction between the child and the slide? A 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.…arrow_forwardThe 300-lb block shown in the figure is kept from sliding down the inclined plane by friction and a force of smallest magnitude F. If the coefficient of friction between the block and the inclined plane is 0.4, then the magnitude of the frictional force is 0.4N, where N is the magnitude of the normal force exerted on the block by the plane. If the system is in equilibrium, use Cramer's rule to solve for F and N.arrow_forwardA block with mass m is at rest on a rough inclined plane and is connected to an object with the same mass as shown. The rope and the pulley may be considered ideal. The coefficient of static friction between the block and the plane is ps; and the coefficient of kinetic friction is uk. If the rope were cut between the block and the pulley, which of the following equations can be used to calculate the magnitude of the acceleration of the block down the plane? (Hint: draw free body diagram). g-Hk cos(e)) Og- P sin(0) Og Og(tan(0) Hk sin(@)) Og(sin(0)- u cos(0))arrow_forward
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- A 50.7 kg box is resting on a horizontal floor. A force of 317.1 N directed at an angle of 34.1° below the horizontal is applied to the box. The coefficient of static friction between the box and the surface is 0.5, and the coefficient of kinetic friction is 0.2. The force of friction on the box is:arrow_forwardA sled is held on an inclined plane by a cord pulling directly up the plane. The sled is to be on the verge of moving up the plane. The magnitude F required of the cord's force on the sled is plotted versus a range of values for the coefficient of static friction between sled and plane. The values are below: F1 = 2.0 N, F2 = 5.0 N for a coefficient of static friction is 0.25. At what angle (in degrees) is the plane inclined? F F -Hsarrow_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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