1. CDA #1: Sports In Science
Study Guide

2. If 4 forces are acting on an object the object can move toward the larger two forces
Mass is unchanged by gravity, weight is changed by gravity
You can increase the effect of gravity by increasing mass or decreasing the distance between them.
Energy can change forms but the total energy doesn’t change

3. 5. Body at rest remains at rest unless acted on by another force. 6
5. Body at rest remains at rest unless acted on by another force. 6. Identify what is and isn’t a simple machine and be able to identify all 6 simple machines. Also, know the different types of levers 7. Gravity pulls thrown objects towards Earth 8. Decreasing surface friction of an inclined plane increases it’s efficiency. 9. The slickest surface has the least friction i.e. ice has less friction than concrete 10. Friction slows the motion of objects

4. 11. Using greater force on 1 object in a set of 2 equal size objects will result in greater acceleration. 12. The longer a ramps surface the less amount of force is required to move objects up the ramp. 13. Simple machines change the direction of force or multiply force. 14. A fulcrum placed closer to an object will require less force to move the object

5. 15. An object will move in motion in the direction of the greatest force 16. A Motionless object has no unbalanced force acting on it. 17. Positive (+) acceleration is speeding up, negative (-) acceleration is slowing down 18. Balanced forces result in no change in motion. 19. A steeper graph has greater acceleration

6. 20. Objects that have more mass have a greater force of gravity 21
20. Objects that have more mass have a greater force of gravity 21. Velocity requires a distance/time in a direction. km/hr east; m/s up; 22. The least steep graph has the slowest acceleration. 23. A steep graph has the greatest acceleration. 24. Potential energy is based on height, highest object has most potential energy 25. Know, understand, and be able to identify Kinetic vs. Potential energy