Help ;-; sorry if im asking again Replace the pencil with an iron nail (Doc.19 in pic)

1. does the lamp glow? (question)

2. does an electric current flow through the lamp? (question)

3. Does the iron nail conduct the electric current? (question)

A6.0-kilogram cart initially traveling at 4.0 meters per second east accelerates uniformly at 0.50 meter per second squared east for 3.0 seconds. what is the speed of the cart at the end of this 3.0 second interval? (1) 1.5 m/s (3) 3.0 m/s (2) 5.5 m/s (4) 7.0 m/s