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# ← Work and Simple MachinesTest

### Question Limit

of 28 available terms

### 5 Matching Questions

1. What is an inclined plane?
2. What are compound machines?
3. ^ ^ Doing work?
4. What is the fulcrum of a lever?
5. what is a screw?
1. a stays still, like the middle of a seesaw.
2. b Yes
3. c a machine made of two or more simple machines. example: scissors, can openers
4. d a simple machine with a straight, slanted surface.
5. e a inclined plane that is wrapped in a spiral, usually on a rod, but not always.

### 5 Multiple Choice Questions

1. a device that helps make work easier by changing the size or direction of a force.
2. a simple machine that is made of a circular object connected to a rod.
3. No
4. No, the same amount of work is done, whether you do it yourself, or use a machine.
5. Doorstop. it holds things together.

### 5 True/False Questions

1. if you are carrying a suitcase,are you doing work on the suitcase? why or why not?No. work is only done when the object moves. if the object doesnt move, no matter how much force you put on it, it isnt work.

2. if you throw a ball, are you doing work? Explain.No. work is only done when the object moves. if the object doesnt move, no matter how much force you put on it, it isnt work.

3. what is a machine's mechanical advantage? if i say a machine has a mechanical advantage of 20, what does that mean?it means that the machine multiplies the force you put into it twenty times. so, if the machine multiplies the force by 20, you would only have to put in a small amount of force to do a large amount of work.

4. ---> ----> Doing work?Yes

5. What is a lever? list two other examples of a lever.stays still, like the middle of a seesaw.