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4. Mr. Ames is dragging a box full of books from his office to his car. The box and books together have a

combined weight of 134 N. If the coefficient of static friction between the pavement and the box is 0.55, low hard

must Mr. Ames push horizontally on the box in order to start it moving?[74N]

Respuesta :

hamzaahmeds

Answer:

F =  73.7 N = 74 N (rounding off)

Explanation:

In order to get the box to start moving, Mr. Ames must push it with a force equal to the frictional force acting on it. Therefore, this force can be calculated through the following formula:

[tex]F = frictional force = \mu R[/tex]

where,

μ = coefficient of friction = 0.55

R = Normal Force on Box = Weight of Box with books = 134 N

Therefore,

[tex]F = (0.55)(134\ N)\\[/tex]

F =  73.7 N = 74 N (rounding off)

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