1) A 42kg box is sitting on a 32° ramp. What are the forces in each direct that are keeping it still?
2) A book is left on an angle table of 35°. if the book weighs 22N and has a normal force of 18N with a force of friction of 11N, what is the net force acting on the book?

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

Are formed where bumps from two surfaces come into contact ?

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.