Forces and Newton's Laws of motion

AI Thread Summary
To determine the force required to push a 75 lb block up an incline at constant speed with a coefficient of kinetic friction of 0.25, it is essential to calculate both the parallel and perpendicular components of the applied force. The frictional force (Ff) can be found using the equation Ff = μN, where N is the normal force. The equation ΣF = ma should be applied, considering that at constant speed, acceleration (a) is zero, leading to Fapp - Ff - Wparallel = 0. Participants emphasize the need to accurately resolve forces before applying Newton's laws. Proper calculations of the incline's angle and the forces involved are crucial for obtaining the correct answer.
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What is the magnitude of the force F (assumed horizontal) required to push the block up the plane at a constant speed? Take the coefficient of kinetic friction to be 0.25. Block is 75 lb

I used Ff= mewN and found Wparallel

Did Ʃ=ma
Fapp-Ff-Wparallel= ma

but i keep getting wrong answer
 
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Qwap said:
What is the magnitude of the force F (assumed horizontal) required to push the block up the plane at a constant speed? Take the coefficient of kinetic friction to be 0.25. Block is 75 lb
What is the angle of the incline?
I used Ff= mewN and found Wparallel
Show your calculations for these terms
Did Ʃ=ma
Fapp-Ff-Wparallel= ma

but i keep getting wrong answer
You need first to calculate the parallel , and perpendicular to the incline, components of F app before solving by using Newton's laws in both dirctions.
 

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