Q. A bale of hay sits on the bed of a trailer. The trailer is starting to accelerate forward to the right, and the bale is slipping toward the back of the trailer.
Draw the vectors starting on the black spot.
Q. An infinitely long line of charge has linear charge density 5.00 x10-12 C/m. A proton (mass 1.67 10-27 kg, charge +1.60 x10-19 C) is 18.0 cm from the line and moving directly toward the line at 1.50 103 m/s. How close does the proton get to the line of charge?