A skater of mass 80 kg initially at rest speeds up to a final speed of 10.0 m/s along a straight line and towards the east direction what is the momentum of the skater while at rest ​

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

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.

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.