A common question in physics, which often arises is the question about whether a friction force,...
A common question in physics, which often arises is the question about whether a friction force, f, does work. If a block is sliding down a rough surface with kinetic coefficient of friction, Mu_k. Carefully reflect on discussions held in class, and then, pick the correct statement about whether the force of friction actually does work on the block, as the block slides down the plane. Select one: a. Work done by friction is equal to zero. b. Work done by friction is greater than zero. c. Work done by friction is less than zero. d. D
Homework Answers
Option(c) Work done by the friction is less than zero, is the correct answer.
Explanation -
Frictional force, F = Mu_k*m*g
In moving the block through a distance d, work done by the frictional force -
W = F *(- d) = - Mu_k*m*g*d
Here negative sign is taken for the displacement because force is acting opposite to the displacement of the block.
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A common question in physics, which often arises is the question
about whether a friction force,...
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An object of mass 8.00 kg starts from rest and a slides 2.00 m down a...
An object of mass 8.00 kg starts from rest and a slides 2.00 m down a rough 35.0° incline. The coefficient of kinetic friction between the block and the incline is 0.366. Determine (b) the work done by the friction force between block and incline (This part (b) of the previous question) 0 -47.00 0 -23.5) 0 -38.6) O-46.3)
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Read each question carefully. Show all your work for each part of the question. The parts within the question may not have equal weight. A block of mass m is placed on an inclined plane that makes an angle with the horizontal, as shown in the figure. The coefficients of static and kinetic friction between the block and the surface are , and , respectively. Express your answers in parts (b) and (c)...
Can you please help me with this physics word problem? Please
explain briefly about each step!
The final answer is already given in dark letter at the
end of the question!
3. H = 8m v = 1 1m/s block of mass m = 1.8 kg starts at rest on a rough inclined plane a height H-8m above the ground. It slides down the plane, across a frictionless horizontal floor, and then around a riction less loop-the-loop of radius R...
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Refer to the figure for problem 1-7 A 20.0 kg block is pushed 16.0 m across a rough surface with a coefficient of kinetic friction N force and is applied at an angle of O = 20.0° to the horizontal efficient of kinetic friction 0.10. The pushing force is 150.0 MS Nimex 1. What is the contact force exerted by the surface on the block? ra, 247 N B....
Ver From the given choices Question 1 7.5 pts An object of mass 8.00 kg starts from rest and a slides 2.00 m down a rough 35.0° incline. The coefficient of kinetic friction between the block and the incline is 0.366. Determine (a) the work done by the force of gravity (This question has 2 parts, this is part (a) of the question)
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Prove that tan theta is equal to mu_k when the block slides down the incline with a constant speed. (Use symbols, not numbers.) If theta is the maximum angle of incline just before the block moves, what is mu_s, in terms of theta? Suppose that the block were made to move up the inclined plane with a uniform speed by suspending masses on a string over the pulley. Derive an equation for the coefficient of kinetic friction...
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Please answer all parts of the
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