Answer:
The speed of combined carts is 0.95 m/s.
Explanation:
When 2 objects stick together after collision, it is an inelastic collision. The the formula is m1u1 + m2u2 = v(m1 + m2) where m is mass of an object, u is initial velocity and v is final velocity :
[tex]m1u1 + m2u2 = v(m1 + m2)[/tex]
[tex](1.8 \times 1.9) + (1.8 \times 0) = v(1.8 + 1.8)[/tex]
[tex]3.42 = 3.6v[/tex]
[tex]v = 3.42 \div 3.6[/tex]
[tex]v = 0.95 m {s}^{ - 1} [/tex]
