Contact Forces (2) WP

3. upward-acting force
6. the idea that an object will continue its current motion until some force causes its speed or direction to change
7. the force that pulls objects toward the center of the Earth
10. the sum of all the forces acting on an object
13. the things an object needs to have or do to meet the main goal or purpose of the device
15. people, groups, or things that are impacted by design decisions
17. a diagram that shows the forces acting on a single object in a system
19. when two objects collide
20. energy in a system that is the result of a change in the position of objects
22. interconnected cells that make up the brain and send signals, the long part of the neuron is called an axon
23. a collision in which there is not net loss in kinetic energy in the system
24. kinetic energy, potential energy, chemical energy, wind energy

1. forces applied to an object in opposite directions that are not equal in size
2. when energy is relocated from one system to another
4. a type of brain injury, caused by a bump or blow hit that causes the head and brain to move rapidly back and forth
5. a collision in which there is a loss of kinetic energy
8. all other considerations and limits from people and the environment
9. a reaction force when a system expels or accelerates mass in one direction, the accelerated mass will cause an equal force but in the opposite direction to be applied to that system
11. change in speed or change in direction-or both
12. the contact forces between a moving object and the air particles it collides with
14. forces that are equal in size and opposite in direction
16. the contact forces between a moving object and something it is sliding against
18. the maximum extent of size and the direction of an object
21. when criteria or constraints have to be weighed against each other to make an informed decision