Q. A train 350m long is moving on a straight track with a speed of 84.30km/h. The engineer applies the brakes at a crossing and later the last car passes the crossing with a speed of 16.4 km/h. assuming constant acceleration, find out how long the train blocked the crossing. Ignore the width of the crossing.
Q. Four charges Aq,Bq,Cq, and Dq (q = 5 x 10-07C) sit in a plane at the corners of a square whose sides have length d = 80.0 cm. A charge, Eq, is placed at the origin at the center of the square.
DATA: A = 2, B = 2, C = 1, D = 8, E = 5. Consider the charge at the center of square. What is the x-component of the net force on this charge?