The block of mass m2 in the figure has been adjusted so that the block of mass m, is on the verge of sliding. (a) If m¡ = 7 kg and m, = 5 kg , what is the coefficient of static friction between the table and the block? (b) With a slight nudge, the blocks move with acceleration of magnitude a. Find a if the coefficient of kinetic friction between the table and the block is µk = 0.54 %3D m2

The block of mass m2 in the figure has been adjusted so that the block of mass m, is on the verge of sliding. (a) If m¡ = 7 kg and m, = 5 kg , what is the coefficient of static friction between the table and the block? (b) With a slight nudge, the blocks move with acceleration of magnitude a. Find a if the coefficient of kinetic friction between the table and the block is µk = 0.54 %3D m2

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter4: Newton's Laws Of Motion

Section: Chapter Questions

Problem 74AP: (a) What is the minimum force of friction required to hold the system of Figure P4.74 in...

See similar textbooks

Similar questions

Consider the baby being weighed in Figure 4.34. (a) What is the mass of the child and basket if a scale reading of 55 N is observed? (b) What is the tension T1 in the cord attaching the baby to the scale? (c) What is the tension T2 in the cord attaching the scale to the ceiling, if the scale has a mass of 0.500 kg? (d) Draw a sketch of the situation indicating the system of interest used to solve each part. The masses of the cords are negligible.
A black widow spider hangs motionless from a web that extends vertically from the ceiling above. If the spider has a mass of 1.5 g, what is the tension in the web?
(a) What is the minimum force of friction required to hold the system of Figure P4.74 in equilibrium? (b) What coefficient of static friction between the 100.-N block and the table ensures equilibrium? (c) If the coefficient of kinetic friction between the 100.-N block and the table is 0.250, what hanging weight should replace the 50.0-N weight to allow the system to move at a constant speed once it is set in motion? Figure P4.74
A 3.00-kg object is moving in a plane, with its x and y coordinates given by x = 5t2 1 and y = 3t3 + 2, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t = 2.00 s.
(a) What is the minimum force of friction required to hold the system of Figure P4.74 in equilibrium? (b) What coefficient of static friction between the 100.-N block and the table ensures equilibrium? (c) If the coefficient of kinetic friction between the 100.-N block and the table is 0.250, what hanging weight should replace the 50.0-N weight to allow the system to move at a constant speed once it is set in motion? Figure P4.74
(a) What is the maximum frictional force in the knee joint of a person who supports 66.0 kg of her mass on that knee? (b) During strenuous exercise, it is possible to exert forces to the joints that are easily 10 times greater than the weight being supported. What is the maximum force of friction under such conditions? The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis. Increased frictional forces can cause further damage and pam.
A box of bananas weighing 40.0 N rests on a horizontal surface.The coefficient of static friction between the box and the surfaceis 0.40, and the coefficient of kinetic friction is 0.20. If the monkey applies a horizontal force of 18.0 N, what is the magnitude of the friction force and what is the box’s acceleration?
2.0 kg against a vertical wall by exerting 40 N, on it. The coefficients of static and kinetic friction 3. 10 A person holds a book of mass m = a horizontal force, Fext between the book and wall are p, = 0.6 and Hk = 0.4, respectively. The book is stationary. %3D +y Calculate a numerical value for the force (a vector) that the wall exerts on the book. Put your numerical vector answer in component form.
A 3.5 kg block is placed on a surface inclined by 0, = 27° above horizontal. The coefficient of kinetic friction is 0.12. A horizontal force F = 41 N is applied. Assume kinetic friction. F m What is the acceleration of the block? (Answer in m/s2.)
A box rests on top of a flat bed truck. The box has a mass of m = 20 kg. The coefficient of static friction between the box and truck is u, = 0.81 and the coefficient of kinetic friction between the box and truck is Hk = 0.62. 1) The truck accelerates from rest to v; = 16 m/s in t = 12 s (which is slow enough that the box will not slide). What is the acceleration of the box? m/s Submit You currently have O submissions for this question. Only 5 submission are allowed. You can make 5 more submissions for this question. 2) In the previous situation, what is the frictional force the truck exerts on the box? N Submit You currently have 0 submissions for this question. Only 5 submission are allowed. You can make 5 more submissions for this question. 3) What is the maximum acceleration the truck can have before the box begins to slide? m/s Submit You currently have O submissions for this question. Only 5 submission are allowed. You can make 5 more submissions for this question. 4) Now the…
7. The figure below shows a block with mass m = 5.1 kg pulled up a surface inclined at an angle of ? = 29° with a force of magnitude F = 40 N parallel to the surface. (a) If there is no friction between the block and the surface, what is the magnitude of the block's acceleration (in m/s2)? (b) If instead the coefficient of kinetic friction between the block and the surface is 0.11, what is the magnitude of the block's acceleration (in m/s2)?
A 12.1 kgkg box sits on a horizontal table. A string with tension 30.6 NN pulls on the box to the right, but static friction between the box and the table prevents the box from moving. The coefficient of static friction between the box and the table is 0.43. What is the magnitude of the static friction force on the box?