Calculate the force on the charge at Z (+1 x 10*-8C) due to the charges at X (+2 x 10*-8) and Y(-5 x 10*-8C)​

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

What is the measure of a change in an objects velocity?