In about 1915, Henry Sincosky of Philadelphia suspended himself from a rafter by gripping the rafter with the thumb of each hand on one side and the fingers on the other side (see the figure). Sincosky's mass was 83.0 kg. If the coefficient of static friction between hand and rafter was 0.710, what was the least magnitude of the normal force on the rafter from each thumb or opposite fingers? (After suspending himself, Sincosky chinned himself on the rafter and then moved hand-over-hand along the rafter. If you do not think Sincosky's grip was remarkable, try to repeat his stunt.) Number i Units

In about 1915, Henry Sincosky of Philadelphia suspended himself from a rafter by gripping the rafter with the thumb of each hand on one side and the fingers on the other side (see the figure). Sincosky's mass was 83.0 kg. If the coefficient of static friction between hand and rafter was 0.710, what was the least magnitude of the normal force on the rafter from each thumb or opposite fingers? (After suspending himself, Sincosky chinned himself on the rafter and then moved hand-over-hand along the rafter. If you do not think Sincosky's grip was remarkable, try to repeat his stunt.) Number i Units

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: A woman holds a book by placing it between her hands such that she presses at right angles to the…

A: The Static friction is given by the formula with respect to the force is given as, Fs≤μsFN The…

Q: Students are performing an experiment with the setup shown above, where a block of mass M sits on a…

A: From the question given that hanging mass m accelerates before it touches the ground.When hanging…

Q: Students are performing an experiment with the setup shown above, where a block of mass M sits on a…

Q: In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at…

Q: Students are performing an experiment with the setup shown above, where a block of mass M sits on a…

A: Given Data: To describe how high it bounces in terms of h.

Q: You are holding a book of mass 10.7 kg that is initially at rest against a vertical wall by exerting…

A: Given,Mass, m = 10.7 kgFYb = 100.8 Nμs = 0.46μk =0.36

Q: You can hold a book against the wall, preventing it from sliding down, if you press your hand…

Q: A student of university physics who is transporting a heavy wooden box is becoming cognizant of…

A: Step 1: Let us draw a free body diagram of the situation Step 2: Using Newton's second law along…

Q: In about 1915, Henry Sincosky of Philadelphia suspended himself from a rafter by gripping the rafter…

A: Given data: The mass is m=79 kg. The coefficient of static friction is μ=0.55. Since he gripped…

Q: A student of physics is carrying a heavy wooden crate. Being educated about friction, this student…

A: Draw the free-body diagram of the crate.

Q: There are two forces on the 1.82 kg box in the overhead view of the figure but only one is shown.…

A: There are two forces on the 1.82 kg box in the overhead view of the figure but only one is shown.…

Q: A ladder of length L and mass m leans against the side of a house, making an angle of θ� with the…

Q: A 30 newton block is placed on top of a 100 newton block. This arrangement is being pulled across…

Q: The figure shows a container of mass m, = 3.9 kg connected to a block of mass m, by a cord looped…

Q: al is supported by two cables, each of which makes an angle of 40.0 degrees with the vertical. If…

A: Given values:- Angle inclined,(θ)=400 ---(1) Maximum force,(F)=7.50 x 102 N ----(2) Let us consider…

Q: The figure below shows two crates connected to each other by a light cord that passes over a pulley…

A: In the question given value of mass M1 M2 and incline and angle theta and we have to find --- (a)…

Q: A block weighing 60 N is resting on a flat surface where the coefficient of static friction is 0.55,…

Q: A block of mass m, = 4.00 kg is put on top of a block of mass m, = 5.00 kg. To cause the top block…

A: Here we have to use some basic concept.

Q: In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at…

Q: (a) A 2.25 kg salami is supported by a cord that runs to a spring scale, which is supported by…

A: Consider the given data as below. Mass of salami, m=2.25 kg Acceleration due to gravity, g=9.8 ms2

Q: A 2.5 kg block is initially at rest on a horizontal surface. A horizontal force −→F of magnitude 6 N…

Q: Find (a) the magnitude of the force

Q: In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at…

A: Magnitude of force A FA=214 N, magnitude of force C FC=175 N and angle between FA and FB is given to…

Q: A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a…

Q: In about 1915, Henry Sincosky of Philadelphia suspended himself from a rafter by gripping the rafter…

A: Given information: Here, m is the person’s mass and µ is the friction coefficient between the hand…

Q: Box m₁ = 2.4 kg remains stacked on box m₂ = 15.9 kg as they are pulled from rest across a smooth,…

Q: A patient with a broken tibia has the lower half of his leg suspended horizontally by a cable…

A: Tension is the force transmitted axially by a string, a cable, a chain, or similar object, or by…

Q: You are out on a hike and come across an unfortunate scene: a fellow hiker has fallen off a ledge.…

Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

In about 1915, Henry Sincosky of Philadelphia suspended himself from a rafter by gripping the rafter with the thumb of each hand on
one side and the fingers on the other side (see the figure). Sincosky's mass was 83.0 kg. If the coefficient of static friction between hand
and rafter was 0.710, what was the least magnitude of the normal force on the rafter from each thumb or opposite fingers? (After
suspending himself, Sincosky chinned himself on the rafter and then moved hand-over-hand along the rafter. If you do not think
Sincosky's grip was remarkable, try to repeat his stunt.)
Number
Units

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Mass of person and friction is given

VIEW

Step 2: Determining least normal force

VIEW

Solution

VIEW

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

A block of mass mį = 4.00 kg is put on top of a block of mass mp = 7.00 kg. To cause the top block to slip on the bottom one while the bottom one is held fixed, a horizontal force of at least 15.0 N must be applied to the top block. The assembly of blocks is now placed %3D on a horizontal, frictionless table (see the figure). Find the magnitudes of (a) the maximum horizontal force F that can be applied to the lower block so that the blocks will move together and (b) the resulting acceleration of the blocks. (a) Number i Units (b) Number i Units >
The upper leg muscle (quadriceps) exerts a force of FQ = 1080 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in the figure. Find the magnitude of the force, in newtons, exerted by the kneecap on the upper leg bone (the femur) at the point P. What angle does the force from the kneecap act at, in degrees measured counterclockwise from the positive x-direction shown in the figure?
A block is pushed across a horizontal surface by the force shown. If the coefficient of kinetic friction between the block and the surface is 0.39, F = 45 N, 0 = 19°, and M = 2.5 kg, F M (a) What is the magnitude of the normal force, applied by the contact surface on the block, in (N)? (b) What is the magnitude of the friction force on the block in (N)? (c) What is the magnitude of the acceleration (in m/s²) of the block?
An object hangs between two walls which are 1.8 m apart. If the rope sags 15° below horizontal and the object’s mass is 1.5 kg, what is the tension in the rope?
The block shown in the figure is sliding along a frictionless horizontal surface The block's mass is m = 4.80 kg,the magnitude of the applied force is F = 26.5 N, and the angle of the applied force F from the horizontal is θ = 28.0°. Determine the magnitude n of the normal force acting on the block.
A block of mass m t = 4.0 kg is put on top of a block of mass m b = 5.0 kg. To cause the top block to slip on the bottom one while the bottom one is held fixed, a horizontal force of at least 12 N must be applied to the top block (not pictured). The assembly of blocks is now placed on a horizontal, frictionless table. Find the magnitudes of (a) the maximum horizontal force F that can be applied to the lower block so that the blocks will move together and (b) the resulting acceleration of the blocks.Can you solve this with a detailed explanation
You are a bully. You pin a 48 kg dweeb to a wall so that his feet aren't touching the ground. Your arm is extended so that it makes an angle 28 degrees with the horizontal. The dweeb's back is so sweaty with fear that there is no friction between his back and the wall. What is the magnitude of the force , in N, you must apply to keep the dweeb in equilibrium? (Use g = 10 m/s2) This scenario is represented schematically below. Unfortunately for you, years later the dweeb is your boss and he makes your life miserable. (Please answer to the fourth decimal place - i.e 12.3445)
In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force F A of magnitude 214 N, and Charles pulls with force F c of magnitude 183 N. Note that the direction of F c is not given. What is the magnitude of Betty's force F B if Charles pulls in (a) the direction drawn in the picture or (b) the other possible direction for equilibrium? Alex Charles 145° Betty (a) Number i Units (b) Number i Units >
A stone has a mass of 8.79 g and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.818. When the tire surface is rotating at 10.9m/s, the stone flies out the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 2.46 N. Assume that only static friction supplies the centripetal force, and determines the radius r of the tire (in terms of m)
Students are performing an experiment with the setup shown above, where a block of mass M sits on a horizontal table. The coefficient of kinetic friction between the block and the table is μk. The block is connected to a hanging object over a pulley. The pulley has negligible mass and friction. The string connecting the two is very light and does not stretch. The students add mass to the hanging object so that its mass is m, where m < M, and the block-hanging object system is released from rest. The hanging object falls for a distance h, at which point it collides with the ground and comes to rest. The block on the table keeps sliding and travels a total distance d before coming to rest. It does not reach the pulley, and d > h. A student creates a data table (see image) for the net force exerted on the block during the speeding up and slowing down portions of the experiment. (d) Does the block of mass M spend more time speeding up or slowing down? Justify your answer.
F 0 EC FAC $ Ed and Al are pushing on a couch as shown in the picture and it doesn't slip. Ed is pushing with a force of 198.9 N at an angle of 0 = 54 degrees with respect to the vertical and Al is pushing with a force of 60.2 N at an angle of = 35.4 degrees with respect to the horizontal. If the couch has a mass of 83 kg and the coefficients of static and kinetic friction between the couch and the floor are μg = 0.53, and k = 0.39, what is the magnitude of the force of friction exerted by the floor on the couch? Click here for a hint F
A loaded penguin sled weighing 61.0 N rests on a plane inclined at angle θ = 23.0° to the horizontal (see the figure). Between the sled and the plane, the coefficient of static friction is 0.260, and the coefficient of kinetic friction is 0.120. (a) What is the minimum magnitude of the force ?→�→, parallel to the plane, that will prevent the sled from slipping down the plane? (b) What is the minimum magnitude F that will start the sled moving up the plane? (c) What value of F is required to move the sled up the plane at constant velocity