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26 Nov 2019

Work Example II

A box with a mass of 1.0 kg is moving to the right. Itsinitialspeed is 2 m/s. After traveling 3 m, its speed is 4 m/s.Inadditional to the usual forces (gravity, normal, friction)thereare two other forces acting on the box. One is a 5 N forcethat hasan upward vertical component of 4 N and a component to theleft of3 N. The other force is 8 N to the right.

(a) What is the normal force?

(b) What is the coefficient of kinetic friction?

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Trinidad Tremblay
Trinidad TremblayLv2
2 Apr 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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A 55 kg is pushed a distance of 7.0 m across the floor by a force whose magnitude is 150 N.  The force is parallel to the displacement of the box.  The coefficient of kinetic friction is 0.25. Determine the work done by each of the forces acting on the box. Please show work.

A horizontal force F1=75 N and a force F2=16.5 N, acting at an angle θ to the horizontal, are applied to a block of mass m=2.5 kg. The coefficient of kinetic friction between the block and the surface is μk=0.2. The block is moving to the right.

(a) Solve numerically for the magnitude of the normal force, FN in Newtons, that acts on the block if θ=30°.

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