A 75 kg skier grips a moving rope that is powered by an engine and is pulled at constant speed to the top of a 21 hit. The skier is pulled a distance z 230 m along the incline and it takes 2.1 min to reach the top of the hill. Part A If the coefficient of kinetic friction between the snow and skis is 0.10, what horsepower engine is required i 30 such (max) are on the rope at one time? Express your answer using two significant figures. ΨΗ ΑΣΦΗ P- 22.75 Submit Previous Answers Bequest Answer ? X Incorrect; Try Again; 2 attempts remaining Beview Consta bp

A 75 kg skier grips a moving rope that is powered by an engine and is pulled at constant speed to the top of a 21 hit. The skier is pulled a distance z 230 m along the incline and it takes 2.1 min to reach the top of the hill. Part A If the coefficient of kinetic friction between the snow and skis is 0.10, what horsepower engine is required i 30 such (max) are on the rope at one time? Express your answer using two significant figures. ΨΗ ΑΣΦΗ P- 22.75 Submit Previous Answers Bequest Answer ? X Incorrect; Try Again; 2 attempts remaining Beview Consta bp

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.3P: Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair...

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Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair is denoted by G. The coefficient of static friction is 0.2 at B (the contact point between the chairs) and 0.35 at A, C, and D. Determine the smallest force P that would cause sliding.
2. Find the least value of P required to cause the system of blocks to have impending motion to the left. The coefficient of friction is 0.2 under each block. 300 Ib 100 lb 30 °
A mountain camper has problems with his off road vehicle. To hold it in place the camper wraps a rope abound a treen + turns. The coefficient of friction between the rope and the tree is u. = 0.23. The car pulls on its end of the rope with a force of 2250 N. The camper wants to pull on the rope with a force no greater than P = 54 N. P Determine the integer value of n. (Enter the minimum possible integer value of n.)
(Wnet) the men exert on the box? 2. In example 1, the box of cookies has a mass of 45 kg and the coefficient of friction between floor and the box is 0.3. Determine the work done by each force if the factory worker pushes the box 8 m across the factory floor.
Two blocks are connected by a rope that passes over a frictionless pulley A and a fixed drum B, as shown below. The coefficient of friction between the rope and the drum is 0.3 and between all other surfaces is 0.4. Determine the minimum force P that must be applied to the bottom block to start motion. be a fi Ele Bipaints) B 28° A go 0.4 m 1.8 m 0.8 m org 120 N 220 N ون ang Answers yess Blocky most be slipping Bock within revitslips wh DEXAL.DD Block 1 Block 2 P mor
Question 3) The masses of A and B blocks are mA and mB, respectively. These two blocks are connected by a handle and released. Calculate the force on the arm. Take the kinetic friction coefficient between A block and the surface as µA = 0.15 and the kinetic friction coefficient between B block and the surface as µB = 0.4. Neglect the %3D mass of the arm. mA(kg)= 7.5 mB (kg)=3.75 e (o)=40 A B
The height of the g point is 0.5m, the distance of the rear wheel to theg point is 1.75m, the distance of the front wheel to the g point is 1.8 m, and the car with a mass of 2100kg brakes suddenly while moving at 24v speed. l-Find the friction coefficient between the wheel and the road? 2-Find the way the vehicle takes until it stops?
a. A vehicle with the handbrake drawn must be pushed and moved. The vehicle weight is 1200 kg, and the force required to push the vehicle is 300 kg (G=10 m/s2 can be taken). Determine the value of the coefficient of friction that occurs when the wheels of the car make a sliding movement on the asphalt. As the car is pushed and moved, the speed of the car increases to 3.6 km/h. Find the power spent on friction b. An oil film was formed under the wheels while the same vehicle was pushed with the handbrake drawn, and the vehicle thrust was reduced to 6 kg (G=10 m/s2). Determine the value of the coefficient of friction that occurs between the molecules of the lubricant. The speed of the vehicle increases to 3.6 km/h when the vehicle is moved by pushing on the oil film. Find the power spent on friction
The coefficients of friction between the block ana the rail are us= 0.25 and uk= 0.20. Given: P2 = 200 N. P1 350 P2 Find the magnitude and direction of the smallest force P1 required to start the block moving up the rail. (You must provide an answer before moving on to the next part.) The magnitude and direction of the smallest force P1 required to start the block moving up the rail is °. N v (Click to select)
2. A box of 450N is lying in an inclined plane with angle of 35 degrees. If the applied load to move the box is 269N. Determine the net Ff and the acceleration of the box if the coefficient of static friction is 0.35 and the coefficient of kinetic friction is 0.28.
100 kg Required: a)Minimum mass so that the block will not move. b)Maximum mass so that the block will not move. 20° mo Determine the range of values which the mass mo may have so that the 100-kg block shown in the figure will neither start moving up the plane nor slip down the plane. The coefficient of static friction for the contact surfaces is 0.30.
Two blocks with masses ma = P kg and mg = 100 kg are connected with a flexible cable that passes over a frictionless pulley as shown in Fig. The coefficient of friction between the blocks is 0.2. If motion of the blocks is impending, determine the coefficient of friction between block B and the inclined surface and the tension in the cable between the two %3D blocks. the force for P is 78kg A B 40°