Answer:-2.61 m/s
Explanation:
This problem can be solved by the Conservation of Momentum principle, which establishes that the initial momentum 
must be equal to the final momentum 
:
(1)
Where:
(2)
(3)
is the mass of the first car
is the velocity of the first car, to the North
is the mass of the second car
is the mass of the second car, to the South
is the final velocity of both cars after the collision
(4)
Isolating :
(5)
(6)
Finally:
(7) This is the resulting velocity of the wreckage, to the south
Answer:
8N
Explanation:
Applied force - Frictional force = net force
A good scientific question should be pre-determined and also have a meaning or relation to science.
This is most likely an example of kinetic energy.
There will still be 8g due to the law of conservation of mass. An object undergoing a physical change (change in state, color change..) will have the same mass before and after.
