Q. A uniform circular ring of charge Q= 7.30 microCoulombs and radius R= 1.10 cm is located in the x-y plane, centered on the origin. What is the magnitude of the electric field E at point P, located at z= 2.80 cm?
Q. A tow truck pulls a car 5.00 along a horizontal roadway using a cable having a tension of 850 .
a)How much work does the cable do on the car if it pulls horizontally?
b)How much work does the cable do on the car if it pulls at 35.0^circ above the horizontal?
c)How much work does the cable do on the tow truck if it pulls horizontally?
d)How much work does the cable do on the tow truck if it pulls at 35.0^circ above the horizontal?
e)How much work does gravity do on the car in part A?