14. When the forces acting on an object are change in motion.
, there is no
15. When the forces acting on an object are in motion.
, there is a change
Review 1. List the forces that cause a ball to slow down and stop when it is rolled along the ground. 2. Describe and provide an example of a contact force. 3. True or false. Friction is a non-contact force. 4. List three forces that can act at a distance. 5. Why does a rocket need a large force to lift it into space? 6. True or false. An object at rest with zero net force acting upon it will remain at rest. 7. Describe what happens to an object when the forces acting on the object do not sum to zero. 8. Predict and describe the motion of the children. What are the forces that cause the motion?
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