1 point
How fast does a 400 kg car have to move to have a momentum of 800
kgm/s?

2m/s

Explanation:

Given parameters:

Mass of car  = 400kg

Momentum  = 800kgm/s

Unknown:

Speed of the car  = ?

Solution:

The momentum of a car is amount of motion it posses;

      momentum  = mass  x velocity

  Insert the parameters and solve;

         800  = 400 x v

             v  = 2m/s

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

what question you dont ask a question

explanation: