Question

a car of mass 1800 kg stopped at a traffic light is struck from the rear by a 900 kg car, and the two become entangled. If the smaller car was moving at 20.0m/s before the collision.
what is the velocity of the entangled cars before the collision?
in which direction will the entangled cars be moving?

Answer 1

Answer:

v1=4m/s

Explanation:

as

m1 = 1800

v1' = o

m2 = 900

v2 = 20m/s

v1 =?

v1' = (m1-m2)/(m1+m2 ) *v1        + (2 m2) / (m1)+m2  * v2

v1 = -4m/s

negative sign shows it is in opposite direction

hope it is correct!