1. Describe friction in your own words. 2. Two examples of __________ are gravity and magnetism. Understand Key Concepts 3. As the distance between two objects increases, the gravitational fo rce between theobjects A. increases. B. decreases. C. creates friction. D. stays the same. 4. Describe the forces acting on a cyclist who is slowing down as he o r she climbs a hill. 5. Identify any balanced and unbalanced forces acting on a book restin g on a table. Use the figure below to answer question 6. 6. What is the net force on the object? A. 30 N to the right B. 30 N to the left C. 60 N to the right D. 90 N to the left 7. Which is a contact force? A. A girl pulls the plug of an electric hair dryer from the socket.
