Question from my vector statics class (deals with vectors from physics)
see attachment.
i have broken down the forces into their x and y components. however, i cannot use fx=0 and fy=0 since i have more than 2 unknowns. it seems that i need to realize something that will cancel one of the two forces. ples

must explain answer

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.