Q. Attempting to stop on a slippery road, a car moving at 90km/h skids across the road at a 30 degrees angle to its initial motion, coming to a stop in 3.9s . Determine the average acceleration in m/s^2 (meter per second square), using a coordinate system with the X axis in the direction of the car's original motion and the Y axis toward the side of the road to which the car skids.
Q. An electron accelerated by voltage of 1000V, enter a magnetic field at the right angel(90 degree) to the direction of the field.if the magnetic field strength is 2x10^-5T. calculate the change in electric potential energy and electron when it enters the field.