# Science

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The flashcards below were created by user dominique on FreezingBlue Flashcards.

1. What is the equation for work?
work=force*distance
2. You pull a sled through snow

work
no work
work
3. A machine is a device that makes work EASIER by:

• 1.amount of force exerted
• 2.distance over which you exert the force
• 3.the direction in which you exert it
4. What is the SI unit for work?

a.Newtons
b.Pascal
c.Joules
Joules
The number of time a machine multipies the input force.
6. You hold a bag of groceries.

work
no work
No work
7. What formula is used to calculate power? Write the formula in TWO diffrent ways.
• Power=work/time
• Power=force*distance/time
8. what direction MUST motion be in to do work?
the SAME direction as the force
9. Power:
The rate at which work is done; the rate at which energy is consumed.
10. You pull books out of ypur book bag

work
no work
work
11. you push a car stuck in the snow

work
no work
no work
12. you lift a bin of newspaper

work
no work
work
13. you hold a heavie piece of wood in place

work
no work
no work
14. Input Distance:
distance through which the import force acts.
15. Output Distance:
Distance through which the output for acts.
16. Pulley:
a rope, chain or belt wrapped around a grooved wheel.
17. types of pulleys:
1.fixed
2.movable
3.block and tackle
• 1. is attached to a struckture
• 2. is attached to the object you are moving
• 3. combines fixed and moveable pulleys

### Card Set Information

 Author: dominique ID: 120684 Filename: Science Updated: 2011-12-06 00:43:39 Tags: Test Folders: Description: work and mechanical avantages Show Answers:

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