Recent content by Vivee=)

Oh, I figured it out myself. Thanks for the reply.

Ohh yes, I got it. It must be W=w*d*cos(90-theta) because W=w*d*cos(theta) would find something else.

Ok, I have another work question. What if the box is sliding down a frictionless slope. Would the equation for work be W=w*d*cos(theta), with w=weight and d=distance? Or would it be W=w*d*cos(90-theta)? I'm guessing it's one of these because since the box is moving, work cannot be zero.

Work is the force I would apply times the distance the object moves... OHHH, it's that simple. It doesn't move so work would be zero. Thanks cristo.

So I'm trying to push an big object and it doesn't move, am I doing work on it? Or is work 0 joules?

Oh, i see. I misinterpretted the problem. Thanks for the reply.

Homework Statement A small metal cylinder rests on a circular turntable that is rotating at a constant rate. Let R be the distance between the cylinder and the center of the turntable. Now assume that the cylinder is moved to a new location R/2 from the center of the turntable. Which of the...

I hear diesel engines are better than gasoline engines. Why is that?

Thanks for all the help. I'm learning more from this one thread than from my textbook. x] Ok, the last question! I don't see any reason how the size of the object can affect the magnitude, so the force acting upon the Earth and the moon, or their magnitudes, are equal? And how can we tell if...

LOL, ok, I understand. Thank you. :)

So if there's a downward force of magnitude (5 N) exerting on the book, then what is the cause of it? Ok, if it is gravity, then the table would just collapse. Is the downward force from the table pushing back up on the gravitational force?

I hear from advisors that it's better to take less rigorous classes in the summer because the course tends to go quite fast. I'm planning on taking Pre-Calculus in the summer so I can take Calculus in the regular school year next year. What are the risks? Any feedback or advice from those who've...

This just crossed my mind. The downward force of magnitude from gravity is longer than the upward force of magnitude from the table. Which explains why the downward force of magnitude, the 5 N, comes from gravity. Am I right?

Ok, let me try again with the true/false questions first. "Every force has one and only one 3rd law pair force" false because force always occurs in pairs "The two forces in each pair act in opposite directions" false, normal force may point perpendicularly while gravitational force may...

His voice is unbelievable. O_O