State the two types of intermolucular forces

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?

If the area of a square has increased by a factor of 16, by how much has each side increased?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?