A car of mass 200kg moving at a velocity of 120km/h its velocity to 60km/h in 40 second when the car hits an object 1. Calculate the momentum before hitting the object.
2. Calculate its momentum after hitting the object.
3. Calculate the change in momentum.
4. Calculate the resultant force once the car hit the object

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

current flows in a wire