Question

A 2 000-kg car moving at 20.0 m/s collides and locks to-

gether with a 1 500-kg car at rest at a stop sign. Show

that momentum is conserved in a reference frame mov-

ing at 10.0 m/s in the direction of the moving car.​

Answer 1

Explanation:

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

^

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