Questions 4-5: A truck is 18 m long. When the truck is at rest, a motorcycle passes the length of the truck (from one end to the other) in 0.9 s.

If instead the truck moves at 10 m/s in the same direction as the motorcycle, and the motorcycle has the same speed as before, how long will it take the motorcycle to pass the entire length of the truck?

1.8 s

1.2 s

0.45 s

0.9 s

0.6 s

If instead the truck moves at 10 m/s in the opposite direction as the motorcycle, and the motorcycle has the same speed as before, how long will it take the motorcycle to pass the entire length of the truck?

0.45 s

0.6 s

1.8 s

1.2 s

0.9 s