Q. An infinitely long line of charge has a linear charge density of 7.00×10-12 . A proton is at distance 15.0 from the line and is moving directly toward the line with speed 1700. How close does the proton get to the line of charge?
Q. On a level road with its brakes on, a car traveling at 100 km/hr stops within 85 m when the brakes lock and the car slides.
Whats the acceleration of the car?
What is the coefficient of the kinetic friction of the tires and pavement?