Q. An infinitely long line of charge has a linear charge density of 5.50×10-12 C/m. A proton is at distance 17.5 cm from the line and is moving directly toward the line with speed 2900 m/s.
How close does the proton get to the line of charge?
Q. A flight attendant pulls her 63 N flight bag a distance of 353 m along a level airport floor at a constant velocity. The force she exerts is 37 N at an angle of 56° above the horizontal.
Find the work done by the force of friction on the flight bag.