How do you find force on frictionless inclined planed?

Answer 1

You will need angle of inclination and observe the object motion. Force pushing object up inclined plane is force act against gravity, if the object move at acceleration then the force is more than gravity. You will need to transform distance travel to height using trigonometry from known angle of inclination and calculate acceleration against direction of gravity. Add this extra acceleration to gravity and time the mass you get the force.

So I was just wondering if you could expand on that or tell me an equation that if I only know the angle, the acceleration that they are pushing the block up at , the force of gravity which most people know (9.81 m/s2) and the mass of the block then i could get kinetic force thx

Additional comment

1. Gravity pull down that is mg and incline at angle A

2. Force is on direction of incline plane and against gravity at mg sin(A)

3. At additional acceleration in direction of incline plane e.g. a this excess force is m.a

4. Net force input is m(a+g.sin(A))

if no acceleration observe then it mean a = 0

Thanks