Chapter 10 and Simple Machines review for test

1. In the opposite direction of the force applied to the object 2. The tendenecy of an obejct to resist a change in motion. 3.The amount of matter in an object 4.Acceleration= force divided by mass 5.Centripetal force, satellite

6. Accelerate 7. Mass is the amount of matter in an object. Weight is the affect of the earth’s gravitational pull/force on an object. 8. Fluid friction 9. mass and velocity 10. acceleration will also increase

11. gravity 12. The Earth’s gravitational force is always pulling it toward the center of the Earth. 13. Drawing of rocket 14. Joule(J) 15. Ideal efficiency for a machine is 100%.

16. A machine makes work easier by changing the direction of the force needed to accomplish a task. 17. A fixed point on which a lever rotates. 18. A car’s steering wheel is an example of a wheel and axle. 19. The combination of 2 or more simple machines

20. A force must be applied. 21. A 3rd class lever 22. Wedges 23. A fixed pulley( at the top of a flag pole) and a moveable pulley( on a construction crane) 24. A lever depends on the location of the fulcrum 25. A screw is an inclined plane wrapped around a cylinder or metal rod.

26. 1st class: a seesaw 2nd class: wheel barrow 3rd class: broom/shovel/ hockey stick