15. A force F-25 N that makes an angle @-37" with the horizontal moves a block of mass m-10 kg placed on a rough horizontal surface. The coefficient of kinetic frictional force between the block and the surface is a 0.1. What is the magnitude of the kinetic frictional force (fa) in N? (a) 2.5 (b) 4.0 (e) 5.5 (d) 7.0 (e) 8.5

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Chapter1: Units, Trigonometry. And Vectors
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15. A force F-25 N that makes an angle @-37 with the horizontal
moves a block of mass m-10 kg placed on a rough horizontal
surface. The coefficient of kinetic frictional force between the
block and the surface is p0.1. What is the magnitude of the
kinetic frictional force (fa) in N?
(a) 2.5
(b) 4.0
(e) 5.5
(b) 80
(d) 7.0
(c) 100
16. A block of mass m-7 kg is held stationary by a horizontal force
F pressing it against a rough vertical wall
coefficient of static friction between the block and the wall .=0.5,
what is the minimum magnitude of the force F in N required to keep
in the figure. IF the
it stationary?
(a) 60
(e) 140
(e) 8.5
(d) 120
m
Transcribed Image Text:15. A force F-25 N that makes an angle @-37 with the horizontal moves a block of mass m-10 kg placed on a rough horizontal surface. The coefficient of kinetic frictional force between the block and the surface is p0.1. What is the magnitude of the kinetic frictional force (fa) in N? (a) 2.5 (b) 4.0 (e) 5.5 (b) 80 (d) 7.0 (c) 100 16. A block of mass m-7 kg is held stationary by a horizontal force F pressing it against a rough vertical wall coefficient of static friction between the block and the wall .=0.5, what is the minimum magnitude of the force F in N required to keep in the figure. IF the it stationary? (a) 60 (e) 140 (e) 8.5 (d) 120 m
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