The three diagrams below show a block of mass m being pulled or pushed at constant acceleration a, along a table with a force P. The coefficient of kinetic friction is u,. What is the friction force in each case? Give your answer in terms of the pushing force P, a, m, and the angle 0. (i) (ii) (iii) case (i) Did you draw a free-body diagram for this situation and identify all the forces acting on the object? What is Newton's Second Law for motion in the horizontal direction? case f = uk· (m ·g+P•sin – ) (ii) fk = uk · (m·g - P.sin – ) case (ii) Additional Materials

The three diagrams below show a block of mass m being pulled or pushed at constant acceleration a, along a table with a force P. The coefficient of kinetic friction is u,. What is the friction force in each case? Give your answer in terms of the pushing force P, a, m, and the angle 0. (i) (ii) (iii) case (i) Did you draw a free-body diagram for this situation and identify all the forces acting on the object? What is Newton's Second Law for motion in the horizontal direction? case f = uk· (m ·g+P•sin – ) (ii) fk = uk · (m·g - P.sin – ) case (ii) Additional Materials

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter5: Displacement And Force In Two Dimensions

Section: Chapter Questions

Problem 80A

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Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second exerts a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (See the free-body diagram.) (b) Calculate the acceleration. (c) What would the acceleration be if friction were 15.0 N?
In most of the problems you have dealt with so far, weight is equal in magnitude to that of the normal force. Is it possible for the normal force not to be equal to weight? Explain your answer. Yes, it is possible. Oftentimes, normal force counteracts the weight, thus making them equal. This happens when the object is situated on a horizontal surface and the force is exerted on the direction of the gravitational field. Otherwise, as in the case of an elevator accelerating downwards, N and W will not equalize. Yes, it is possible. Oftentimes, normal force counteracts the weight, thus making them equal. This happens when the object is situated on a vertical surface and the force is exerted on the direction of the gravitational field. Otherwise, as in the case of an elevator accelerating downwards, N and W will not equalize. No, it is not possible. Oftentimes, normal force counteracts the weight, thus making them equal. This happens when the object is situated on a horizontal…
A block with a mass of m = 22 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1. The second has a magnitude of F2 and acts on the body at an angle θ = 15° measured from horizontal, as shown. 1). Please draw the Free Body Diagram for this block, assuming it is in static equilibrium? 2)Write an expression for the component of net force, Fnet,x, in the x-direction, in terms of the variables given in the problem statement. 3)Write an expression for the magnitude of the normal force, FN, acting on the block, in terms of F2 and the other variables of the problem. Assume that the surface it rests on is rigid. 4). The two forces change such that F1 = 11 N and F2 = 19 N. Based on this change, the block may no longer be in static equilibrium. Find the block's acceleration in the x-direction, ax, in meters per second squared.
An 8.40-kg object slides down a fixed, frictionless, inclined plane. Use a computer to determine and tabulate (a) the normal force exerted on the object and (b) its acceleration for a series of incline angles (measured from the horizontal) ranging from 0° to 90° in 5° increments. (c) Plot a graph ofthe normal force and the acceleration as functions of the incline angle. (d) In the limiting cases of 0° and 90°, are your results consistent with the known behavior?
Kindly solve the problem and please include the following: Free body diagram of each block or tension Vector system representation Derivation of (Summation X and Y) Solution( Please be detailed and enumerate all the process because i’m going to study that soon ,don’t just give me an answer) Lastly i prefer you to answer that in a very clean paper to illustrate the problem properly. Thanks in advance Keep safe
Three blocks are connected on the table as shown below. The coefficient of kinetic friction between the block of mass m2 and the table is 0.400. The objects have masses of m1 = 4.25 kg, m2 = 1.25 kg, and m3 = 1.90 kg, and the pulleys are frictionless.(a) Determine the acceleration of each object, including its direction. (b) Determine the tensions in the two cords. (left and right)(c) If the tabletop were smooth, would the tensions increase, decrease, or remain the same? Possible answers:The tensions in the both cords will remain the same. The tension in the left cord will decrease while the tension in the right cord will increase. The tension in the left cord will increase while the tension in the right cord will decrease.
A block with a mass of m = 45 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1. The second has a magnitude of F2 and acts on the body at an angle θ = 17° measured from horizontal, as shown. 1) Write an expression for the magnitude of the normal force, FN, acting on the block, in terms of F2 and the other variables of the problem. Assume that the surface it rests on is rigid. 2) The two forces change such that F1 = 9.5 N and F2 = 23.5 N. Based on this change, the block may no longer be in static equilibrium. Find the block's acceleration in the x-direction, ax, in meters per second squared.
A rope pulls on the lower block in the figure with a force of 46.2 N. The coefficient of kinetic friction between the lower block and the surface is 0.1. The coefficient of kinetic friction between the lower block and the upper block is also 0.1. Consider the pulley/ropes to be massless and frictionless. The upper block's mass is 2.5 kg. The lower block's mass is 4 kg. What is the acceleration of the lower block? Express your answer in m/s2. Your result must contain at least one digit after the decimal point
Can you please draw the free body diagram of the problem? A mass of 10kg sits on a level surface. One end of the surface is raised until the block begins to slide down the ramp at a constant velocity and angle of 20⁰. a. What is the coefficient of friction between the block and the inclined plane? b. What is the weight of the Block,w? c. What is the Normal Force, N? d. What is the Frictional Force, Ff?
A block weighs 100. N and rests on a horizontal surface. If Ms = 0.50 and uk = 0.20 between the block and the horizontal surface, then (a) What is the magnitude of the frictional force acting on the block? Justify your What is the magnitude of the frictional force acting on the block if a horizontal force of 35.0 N is now used to push the block? Justify your answer with a calculation. What is the magnitude of the minimum horizontally applied force that will start the block sliding? Justify your answer with a calculation. If the magnitude of the applied horizontal force on the block is 55.0 N, what is the magnitude of the frictional force acting on the block? Justify your answer with a calculation.
An astronaut pushes a block and mass M that is on a surface as shown in Fig. 1(c). A magnitude of the force applied by the astronaut is B and the direction is given by angle θ in the figure. This experiment is done in space where gravity is negligible. The coefficients of static and kinetic friction between the block and thesurface are both µ. (a) Assume that the block does not move. Draw the free-body diagram with all the forces acting on the block. (b) Consider that the block still does not move, find the magnitude of the forces acting acting on the block as a function of the given quantities. (c) Consider now that the astronaut wants the block to move. move. He will accomplish this by pushing harder (changing B), or pushing at a different angle (by changing θ), or by changing both? Find the requirement needed for B and/or θ for the block to start moving. motion. If there is no constraint on B and/or θ explain why.
An elevator, complete with contents, has a mass of 2000.0 kg. For each of the two situations described in a) and b) below, do the following. - Draw a free-body diagram showing the correct relative lengths of the Tand the F vectors. - Determine the value of T (the tension in the elevator cable). - State the value of the real weight and the apparent weight in each case. • a. The elevator is moving up at a constant velocity of 2.0 m/s. • b. The elevator is moving up at a constant acceleration of 1.0 m/s squared?