Posted by **Nala** on Wednesday, October 14, 2009 at 8:38pm.

An object of mass M = 1,338 g is pushed at a constant speed up a frictionless inclined surface which forms an angle θ = 50 degrees with the horizontal. Incline is increasing. What is the magnitude of the force that is exerted by the inclined surface on the object?

- Physics -
**bobpursley**, Wednesday, October 14, 2009 at 8:44pm
What is the normal component of weight?

- Physics -
**Nala**, Wednesday, October 14, 2009 at 8:46pm
ok, so what do you mean by component of weight? anyways, this is what i thought should be the answer F= mgsin(θ) is that correct?

- Physics -
**Gharib**, Monday, October 25, 2010 at 1:40pm
Tilt your axis such that, Y is pointing to the opposite of Weight of M. And X is pointing towards the right. (like usual). [The axis shown in the diagram requires you to find Fnet, which I don't know how to find; thus use this method].

In that case,

Positive being up,

-W(of M)+Ncos50=0

=> N=Mg/cos50

plug your numbers, that's your answer.

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