Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 5, Problem 42P
(a)
To determine
The method which requires less force.
(b)
To determine
The minimum force needed to move the box for given conditions.
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An inextensible cable of negligible mass is used to drag a log on a roughhorizontal surface. The tension in the cable is 850 N and it acts at an angle of 35°to the horizontal. The log is dragged over a distance of 45m. The frictional forceexperienced by the log is 150 N. Calculate the net force acting on the log.
A horizontal force of 200 N is used to push a 50.0-kg packing crate a distance of 6.00 m on a rough horizontal surface. If the crate moves at constant speed, the coefficient of kinetic friction between the crate and surface.
(a) A force F pushes on a 25kg box as shown in the
figure. The coefficient of static friction between
F
25 kg
box and indine is Hs = 0.20. How large a
horizontal force must push on the block if the
40°.
block is to be on the verge of sliding up the
incline?
40°
(b) A force F applied to an object of mass m
produces an acceleration of 3 m/s?. The same
force applied to a second object of mass m2 produces an acceleration of 1 m/s?. If mi and m2 are combined, find
their acceleration under the acdtion of the force F?
Chapter 5 Solutions
Physics for Scientists and Engineers
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- Two blocks connected by a string are pulled across a horizontal surface by a force applied to one of the blocks, as shown below. The coefficient of kinetic friction between the blocks and the surface is 0.25. If each block has an acceleration of 2.0m/s2to the right, what is the magnitude Fof the applied force?arrow_forwardA box with a mass of 0.5 slugs lies on an inclined plane making an angle of 30o with the horizontal. If the coefficient of kinetic friction between the box and the plane is 0.4, what is the magnitude of the force that must be applied parallel to the incline to keep the box moving down the incline at a constant speed?arrow_forward(a) A force F pushes on a 25kg box as shown in the figure. The coefficient of static friction between F 25 kg box and indine is µs = 0.20. How large a horizontal force must push on the block if the 40. block is to be on the verge of sliding up the incline? 40° (b) A force F applied to an object of mass m produces an acceleration of 3 m/s?. The same force applied to a second object of mass m2 produces an acceleration of 1 m/s. If mı and m2 are combined, find their acceleration under the adion of the force F?arrow_forward
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