Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Question
Chapter 5, Problem 54P
(a)
To determine
In order to move the block, minimum force should be applied at an angle
(b)
To determine
Minimum value of force is
(c)
To determine
If the mass starts moving by applying force. To move it by applying minimum force should we increase or decrease angle θ.
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A 7.3 kg crate is moved rightward across a horizontal surface by a horizontal force such that it has constant velocity. If the coefficient of the kinetic friction is 0.58, calculate the magnitude of the kinetic friction force.
the coefficient of static friction between block A and a horizontal floor is 0.320, and the coefficient of static friction between block B and the floor is 0.300. The mass of each block is 2.00kg,and they are connected together by a cord. If a horizontal force F pulling on block B is slowly increased ,in a direction parallel to the connectin cord,until the block start sliding ,what is the magnitude of F at the instant that they start to slide?
•7SSMThere are two forces on the 2.00 kg box in the overhead view of Fig. 5-31, but only one is shown. For F1 = 20.0 N, a = 12.0 m/s2, and θ = 30.0°, find the second force (a) in unit-vector notation and as (b) a magnitude and (c) an angle relative to the positive direction of the x axis.
Chapter 5 Solutions
Physics for Scientists and Engineers
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- A student, crazed by final exams, uses a force of magnitude 80 N and angle u =70 to push a 5.0 kg block across the ceiling of his room ). If the coefficient of kinetic friction between the block and the ceiling is 0.40, what is the magnitude of the block’s acceleration?arrow_forwardBlock A in Fig. P5.72 weighs 60.0 N. The coefficient of static friction between the block and the surface on which it rests is 0.25. The weight w is 12.0 N and the system is in equilibrium. (a) Find the maximum weight w for which the system will remain in equilibrium. (b) Find the friction force exerted on block A. Show the complete solution and draw the free diagrams.arrow_forwardA block of mass M slides down a frictionless plane inclined at an angle ? with the horizontal. The normal reaction force exerted by the plane on the block is? CHOICES: MgMg sin Mg cos "zero, since the plane is frictionless.?arrow_forward
- A body of mass m moves in a horizontal direction such that at time t its position is given by xt) = a cos(wt + ) where a, w, and are constants. What is the time dependent force acting on the body?arrow_forwardTwo blocks, of weights 2.0 N and 5.4 N, are connected by a massless string and slide down a 33° inclined plane. The coefficient of kinetic friction between the lighter block and the plane is 0.061; that between the heavier block and the plane is 0.17. Assuming that the lighter block leads, find (a) the magnitude of the acceleration of the blocks and (b) the tension in the string.arrow_forwardConsider a thin slice of the first rod, of thickness dr, that is located a distance r from the origin and a thin slice of the second rod, of thicknessdo2, that is located a distance t2 from the origin. Enter an expression for the magnitude of the force dF12 that the thin slice of rod 1 exerts on the thin slice of rod 2, interms of L1, L2, Q1, Q2, *1, *2, and the Coulomb constant k.Write an equation for the total force on the slice dr of the second rod, due to the total charge on the first rod, in terms of the defined quantitiesCalculate the magnitude of the total force, in newtons, on the second rod due to the total charge on the first rod.arrow_forward
- In Fig. 6-59, block 1 of mass m1 ? 2.0 kg and block 2 of mass m2 ? 1.0 kg are connected by a string of negligible mass. Block 2 is pushed by force F of magnitude 20 N and angle u ? 35°. The coefficient of kinetic friction between each block and the horizontal surface is 0.20. What is the tension in the string? (please don't copy-paste solution)arrow_forwardThe coefficient of static friction between block A and a horizontal floor is 0.470, and the coefficient of static friction between block B and the floor is 0.300. The mass of each block is 2.00 kg, and they are connected together by a cord. If the horizonta force F pulling on block B slowly increased, in a direction parallel to the connecting cord, until the blocks start sliding, what is the magnitude of F at the instant that they start to slide?arrow_forwardIf a 2.89 kg object is placed on a horizontal surface, what is its magnitude of acceleration if the coefficient of kinetic friction is known to be 0.442 and an applied force of 37 N directed at an angle of -25.6 degrees relative to the +x direction acts on the object?arrow_forward
- If the coefficient of kinetic friction, , between the block and the surface is 0.30 and the magnitude of the frictional force is 80.0 N, what is the weight of the block? ( Assume the block is on a horizontal surface)arrow_forwardBlock B in Fig. 6-31 weighs 711 N.The coefficient of static friction between block and table is 0.25; angle u is 30; assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary.arrow_forward
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