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A horizontal force of 12 N pushes a .5 kg book against a vertical wall. The book is initally at rest. If the coefficients of friction are us = .6 and uk = .80 , the magnitude of the frictional force is?
A 0.025-kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 150 N/m. what is the kinetic energy of the block
A piece of a wire, with the cross-sectional area of 0.5176 mm2 and 1.80 m long, What is the resistivity of the material of the wire
A 1000 kg airplane touches down on an icy runway, heading northward at 110 km/h. Find the speed and direction of the combined wreckage
A potential difference V is applied to a wire of cross section A, length L, and resistivity ?. You want to change the applied potential difference, What should be the new values of L and A in terms of the old values
Using a 10 percent cost of capital, Smith capitalized the lease on January 1, 2007, in the amount of $125,096. Illustrate what is the amount of current portion of the lease liability Smith should report on the December 31, 2007, balance sheet?
Determine the capacity of a roll crusher. The separation is 7 mm, speed of the rollers is 50 rpm, roller diameter is 23 cm, roller length is 0.4 m
A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250 kg crate. What is the acceleration of the crate if the 750 N forces is maintained after the crate begins to move and coefficient of kine..
A hollow ball is rolling along a horizontal surface at 3.2m/s when it encounters an upward incline. If it rolls without slipping up the incline
Two boat landings are 1.0 km apart on the same bank of a stream that flows at 1.8 km/h. What is the speed of the boat relative to the water
An object is placed 10.0\; cm in front of an unknown type of mirror that produces an erect image that is 3.11 times larger than the original object. What is the focal length of the mirror
Two microscope slides are placed one on top the other. They are in contact at one end but a hair separates them at the other end. What is the thickness of the hair
A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to a depth of 6.00 cm. find the average frictional force that stops the bullet
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