A 134 kg merry-go-round has a radius of 1.6 m and it is rotating with an angular velocity of 0.3 rev/s. What is its angular velocity (in rev/s) after an at rest 83-kg person gets onto it by grabbing its outer edge

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

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?