- #1
leianne
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Homework Statement
Determine the magnitude of the horizontal force Fp required to push a block of a mass 30 kg, up along an inclined plane, with a constant acceleration of 0.8m/s2. The plane makes an angle of 25° to the horizontal and the coefficient of kinetic friction between the plane and the block is 0.21. (Hint: The solution involves setting up simultaneous equations in terms of x and y components of the unknown force, i.e. Fpcos25° and Fpsin25°, and then solving them for Fp.)
Homework Equations
I asked my teacher how to do it but i didn't really understand him. He gave me this formula to find Fp. The answer given by the book is 250 N.
Fpcosθ = Fg +μ(mgcosθ + Fpsinθ) + Fa
where Fp= Force applied/of pull
Fa= Acceleration Force
Fg= Force due to gravity/weight
The Attempt at a Solution
I have plugged in the given but i still get the wrong answer (400+ N).
Can someone please explain this to me? Help me please. Please.
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