At a wedding reception, a small boy of mass 25 kg is running across the dance floor, then sliding on his knees until he stops. If the kinetic coefficient of friction between the boy's pants and the floor is 0.15, what is the kinetic friction acting on him as he slides? (g = 9.8m/ s-) Hint: F = µk N %3D K

At a wedding reception, a small boy of mass 25 kg is running across the dance floor, then sliding on his knees until he stops. If the kinetic coefficient of friction between the boy's pants and the floor is 0.15, what is the kinetic friction acting on him as he slides? (g = 9.8m/ s-) Hint: F = µk N %3D K

Classical Dynamics of Particles and Systems

5th Edition

ISBN:9780534408961

Author:Stephen T. Thornton, Jerry B. Marion

Publisher:Stephen T. Thornton, Jerry B. Marion

Chapter2: Newtonian Mechanics-single Particle

Section: Chapter Questions

Problem 2.29P: An automobile driver traveling down an 8% grade slams on his brakes and skids 30 m before hitting a...

See similar textbooks

Similar questions

A sleigh is being pulled horizontally by a train of horses at a constant speed of 8.05 m/s. The magnitude of the normal force exerted by the snow-covered ground on the sleigh is 6.37 103 N. a. If the coefficient of kinetic friction between the sleigh and the ground is 0.23, what is the magnitude of the kinetic friction force experienced by the sleigh? b. If the only other horizontal force exerted on the sleigh is due to the horses pulling the sleigh, what must be the magnitude of this force?
An automobile driver traveling down an 8% grade slams on his brakes and skids 30 m before hitting a parked car. A lawyer hires an expert who measures the coefficient of kinetic friction between the tires and road to be k = 0.45. Is the lawyer correct to accuse the driver of exceeding the 25-MPH speed limit? Explain.
A 200 kg crate rests on a floor with carpet. A tired worker pushes with a horizontal force of 600 N on the crate initially resting on a thick pile carpet. The coefficients of static and kinetic friction are 0.60 and 0.40, respectively. Find the magnitude of the frictional force exerted by the surface of the crate by the carpet. Hint: Which type of friction acts in this case? What are the properties of different kinds of friction? O 1176 N O 784 N O 600 N O 1960 N O 500 N TEALING knong
Write an expression for the coefficient of kinetic friction in terms of the symbols introduced in the problem statement and g (the acceleration due to gravity).
b) A girl exerts a 36-N horizontal force as she pulls a 52-N sled across a cement sidewalk at constant speed. What is the coefficient of kinetic friction between the sidewalk and the metal sled runners? Ignore air resistance. Hint: Fk whe 9 M
Santa Claus tries to drag his bag of presents along a horizontal surface by a red rope that is angled at 55 degrees above the horizontal. Santa Claus applies a force due to tension of 4500N along the red rope. This is the minimum force to just start the bag in motion. The coefficient of kinetic friction between the bag and the ground is 0.3 and the coefficient of static friction is 0.5. What is the mass of the bag?
Two crates connected by a rope lie on a horizontal surface (see figure below). Crate A has mass mA and crate B has mass mB. The coefficient of kinetic friction between each crate and the surface is uk. The crates are pulled to the right at constant velocity by a horizontal force F. Calculate the magnitude of the force F in terms of mA, mB,& µk t F A B
You are lowering two boxes, one on top of the other, down the ramp 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 15.0 cm/s. The coefficient of kinetic friction between the ramp and the lower box is 0.486, and the coefficient of ▶ ▶ ▼ static friction between the two boxes is 0.823. You may want to review (Page) For help with math skills, you may want to review: Resolving Vector Components Calculating Trigonometric Function Values For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Toboggan ride with friction II. Part A Part B Part C 32.0 kg 48.0 kg IVE ΑΣΦ T= 356 4.75 m What force T do you need to exert to accomplish this? Express your answer in newtons. ► View Available Hint(s) 2.50 m ? N
A book resting on a sheet of ice is given an initial speed vi in the +x-direction. The coefficient of kinetic friction between the ice and the book is ?k. (a)Write an expression for the acceleration of the book as it slides across the sheet of ice. (Use the following as necessary: ?k and g. Indicate the direction with the sign of your answer.) ax = (b)Use your result to write an expression for the distance d the book slides, using vi, ?k, and g only. d=
Suppose that the coefficient of kinetic friction between Zak's feet and the floor, while wearing socks, is 0.250. Knowing this, Zak decides to get a running start and then slide across the floor. If Zak's speed is 3.00 m/sm/s when he starts to slide, what distance ddd will he slide before stopping? Use 9.81 m/s2m/s2 for the acceleration due to gravity.
The coefficient of static friction between a block and a horizontal floor is 0.47, while the coefficient of kinetic friction is 0.14. The mass of the block is 4.2 kg. If a horizontal force is slowly increased until it is barely enough to make the block start moving, what is the net force on the block the instant that it starts to slide?
A 3.0-kg block slides on a rough horizontal surface. A force of 8.0 N acting parallel to the surface is applied to the block. TI coefficient of kinetic friction between the block and the surface is 0.15. What is the magnitude of the block's acceleration? A) 1.5 m/s 2 В 2.3 m/s 2 1.2 m/s 2 D 1.9 m/s 2 E) 2.9 m/s 2