Question

4. A car ‘A’ with mass 1500 kg starts from rest and after travelling at a speed
of 30m/s has a head on collision with another stationary car 'B' of mass
1000kg. If both cars together move in the direction in which the car A was​

Answer 1

Answer:

From conservation of momentum

Initial momentum = final momentum

m

u

+M

U

=(m+M)

V

1500×25

i

^

+2500×20

j

^

=(1500+2500)

V

V

=9.375

i

^

+12.5

j

^

Final velocity when they stick together is 9.375

i

^

+12.5

j

^