Homework Help: Physics

Posted by Leah on Tuesday, November 17, 2009 at 7:07pm.

An object is placed on an inclined plane which forms an angle B = 18º with the horizontal. An external force F of magnitude 14.3 N is applied to the object. The force F acts in a direction which forms an angle A = 62º with the horizontal. As a result of the force F, the object moves a distance of 0.8 m along the inclined plane. What work was done by the source of force F?

Physics - Leah, Tuesday, November 17, 2009 at 7:44pm
I tried solving this using by drawing it out, using trig and newton's laws to calculate Fx and Fy and used these values to calculate work in x-direction and y-direction.

Finally I used Workx and Workx to find overall work with pythagoras....is this correct?

I got 6.21J as the work
Physics - bobpursley, Tuesday, November 17, 2009 at 8:11pm
No on the workx +worky. Work is not a vector. You just add them as scalars.

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