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

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

v 154.9= 0.9 length length s little over 154.9cm