A2 kg cart moving initially at 4 m/s strikes a 3 kg cart, initially at rest. The two collide inelastically, sticking together. What is
their velocity immediately after the collision?

1.6 m/s

Explanation:

m1v1 = (m1 + m2)v2

=> 2 x 4 = 5 x v2

=> v2 = 8/5

=> v2 = 1.6 m/s

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.