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a window cleaner pushes his brush over a
window vertically. the person pushes the
brush at a constant speed by applying a
force F (see figure). The brush weight is
24N and the coefficient of kinetic friction
is 0.5. the magnitude of the force F (in
Newtons) is .. (sin 37° = 0.6)
....
а. 26
b. 25
С. 24
d. 120
е. 125

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