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tascja
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Homework Statement
There is a box on a frictionless surface that forms an angle of 37 with the horizontal. the box is pushed by a horizontal force (acting on the left top corner) such that it moves with a constant speed. If the mass of the object is 66.2 kg, calculate the magnitude of the external force.
Homework Equations
Fnet = ma
** Note my coordinate system is lined up so that the x-axis is parallel to the angled surface.
The Attempt at a Solution
I thought i knew what i was doing, but i can seem to get the right answer,
for the system Fnet = 0 *constant velocity, means acceleration= 0
Fnet = Fext - (x-component of gravity)
Fext = (x-component of gravity)
(x-component of Fg) = m*g*sin37 = 390 N
Could someone please explain where I am going wrong? Thanks