- #1
bolivartech
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Homework Statement
A block is pushed across a horizontal surface by the force shown (The force is from the left at an angle 30 degrees above the horizontal). If the coefficient of kinetic friction between the block and the surface is 0.30, F=20 N, theta=30 degrees, and M=3.0kg, what is the magnitude of the acceleration of the block.
Homework Equations
Fk=(.3)mg
F-Fk=ma
The Attempt at a Solution
(20 N)(cos 30) - (.3)(3.0 kg)(9.8 m/s2) = (3.0 kg)a
a = 2.83 m/s2
This is incorrect though, and some how should be 1.8. I have tried separating it into X and Y forces and taking the magnitude (square root of x2+y2, but that is even farther away)