NAME: ________________________

# ← Science Chapter 9 (Set 1)Test

### Question Limit

of 16 available terms

### 5 Multiple Choice Questions

1. This is defined as the force acting on something as it moves a certain distance.
2. This is anything that takes up space.
3. A flat slanted surface is an __ __. Example: Ramp
This simple machine makes moving an object up a distance easier than lifting the object straight up.
4. A _ _ is the decrease in effort that is needed to make an object. All simple machines give some of this. Example: Multiple fixed and moveable pulleys combined provide this.
5. Two inclined planes placed back to back is called a... Examples are: knives, axes, blades, hatchets It is used to split or lift objects. _ keeps them in place or they would slide off the object that it is trying to split.

### 5 True/False Questions

1. 3rdThe _ Law of Motion says that force is equal to an object's mass and the acceleration of the object. The following formula illustrates this law:

mass x acceleration = force (ma=F)

2. 1stThe _ Law of Motion is sometimes called "the law of action and reaction". All forces come in pairs. When one object exerts a force on another, the 2nd object reacts by exerting equal force back on the 1st object. Example: A person paddling a boat pushes the paddle backward against the water, and the water reacts by pushing the boat forward.

3. 2ndThe _ Law of Motion says that force is equal to an object's mass and the acceleration of the object. The following formula illustrates this law:

mass x acceleration = force (ma=F)

4. effort forceThe force applied to a simple machine is the __ __.

5. leverTwo inclined planes placed back to back is called a... Examples are: knives, axes, blades, hatchets It is used to split or lift objects. _ keeps them in place or they would slide off the object that it is trying to split.