# Physic

A 25 kg box is set on a flat surface with us=0.62 and uk=0.49. A force of 100N is applied to the box through a rope which makes and angle of 30 degrees with the horizon.

(a)what's the component of Fa that is attempting to move the box sideways?

(b) what's the normal force on the box?

(c)what is the maximum static friction?

(d)what is the kinetic friction?

(e) Does the box move?
-if yes, what is its acceleration?
-if no. what is the static friction on the box?

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1. (a)what's the component of Fa that is attempting to move the box sideways?

(b) what's the normal force on the box? 100cos30

(c)what is the maximum static friction?*25*9.8-100sin30)us

(d)what is the kinetic friction?
same, use uk
(e) Does the box move?
-if yes, what is its acceleration?
net force=m*a
100cos30-(25*9.8-100sin30)uk =ma
solve for a

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