10) A student walks 1.0 kilometer due cast east and 9.0 kilometer due south. Then she runs 13.0 kilometers due west. The magnitude of the student's resultant displacement is. a)15 km b)5.0 km
c) 6.0 km
d) 9.0 km

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?