please help me ?

Posted on 2014-12-11 05:56:00 in Physics by

1.reducing friction can increase a machines________.
A.) efficiency B.) work input
C.)effort distance D.)resistance arm

2. In an actual machine, work input is always ______ work output.
A.) less than B.) more than C.) equal to

3. levers can be divided into ______ classes.
A.) 2 B.)3 C.) 4 D.) 5

4. Explain why work input is always greater than work output when using a real machine.

~FILL IN THE BLANK~

5. _____ is the ratio of work input to work output.

6. A ______ is the amount of work or energy required to maintain a force of one newton through a distance of one meter.

7. The amount by which a machine increases force is the______.

8. ________ is the product of the force applied to an object an the distance the object moves in the direction of the force.

9. The ______ is the distance from the fulcrum to the effort force.

10. The distance from the fulcrum to the resistance is the __________.

11. A ________ is applied to the effort arm of a lever.

12. A ________ makes work easier by changing the amount or direction of an applied force.

13. A _______ is the weight of an object a lever will move.

14. The ________ of an object depends on its postion.

15. _________ is the energy possessed by a moving object.

---

Answer Comment

No Answers Posted Yet.