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leenix
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Homework Statement
Info : g=10ms^-2 Sin30=0.5 Cos30=0.866
http://img227.imageshack.us/img227/8332/xfgdda0.jpg
A box of mass m = 50 kg is initially at rest at point A on a floor with coefficient of kinetic friction μk = 0.1 (see figure below). A person starts pulling the box for a distance Δx = 40 m (from point A to point B) with a force FP = 100 N which acts at a 30o angle as shown in the figure and the box moves horizontally.
a) Draw the free-body diagram of all forces acting on the box
b) Find the normal force FN on the box
c) Find the friction force Ffr on the box
d) Calculate the acceleration a of the box
Homework Equations
– the equation for net force (Fnet = m * a),
– the equation for gravitational force (Fgrav = m * g), and
– the equation for frictional force (Ffrict = µ * Fnorm).
- a=Fnet / m
The Attempt at a Solution
Crap attempts not really worth mentioning.
I can do the Free Body Diagram with No problem.
But can't find the rest, the Equations just don't add up :(
I really need this solved so i can continue studying for my exams :(
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