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Forces&Motion review
Unit review
| Question | Answer |
|---|---|
| Why is it harder to ride your bike on a windy day? | The wind pushes against the bike, creating drag and making it harder to pedal. |
| Why do you need to add lubrication to machine parts? | Lubrication reduces friction. |
| If you apply force in the same direction an object is moving, what will happen? | The object will speed up. |
| When objects are closer together, what is stronger? | Magnetism |
| If neither side of a tug-of-war game is moving, what is this an example of? | Balanced forces |
| An example of friction | Car tires wearing down |
| What is shown on a time-distance graph? | How far an object moves over a period of time |
| What happens when unbalanced forces act on an object? | The object will change in speed or direction. |
| Which force is weakened when water is added? | Friction |
| What units do we use to measure distance? | north, south, east, west |
| Friction causes objects to.... | slow down |
| An object with a greater mass will move slower or faster? | slower |
| What tool do we use to measure mass? | a balance scale |
| What tool do we use to measure distance? | a ruler |
| What does a horizontal line on a time-distance graph show? | an object that has stopped moving |
| What does a steep line on a time-distance graph show? | an object that is moving faster |
| Which force causes objects to fall? | gravity |