1. A collision occurs between a 2.0 kg cart moving at a velocity of 5.0 m/s [West] and a 4.0 kg cart moving at 1.0 m/s [East].
a. Determine the velocity of the carts if they are to stick together.[3]
b. Determine the velocity of the carts after the collision if they collide elastically. [3]

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.

Need only answer if you think you know it