What is the magnitude of the net net force on the charged particle located at the origin? please answer as a formula, you may use the terms 'k', 'q', 'd', 's', 'e', and 'alpha'.

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?

Which best represents the law of conservation of mass ?