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Investigating Motion
Unit B, Chapter 2
| Question | Answer |
|---|---|
| If you walked at the rate of 6km/hr, how far would you walk in 30 minutes? | 3km |
| What measurement of motion do you affect when you change your direction? | velocity |
| The tendency of an object to stay still or stay in motion is called what? | inertia |
| How do forces work? | in pairs |
| What measurement do we use when we measure the force that gravity exerts on an object? | weight |
| Why does a falling object accelerate as it gets closer to Earth? | gravity |
| What causes your hands to warm when you rub them together? | friction |
| A sled works best on what type of surface? | snowy |
| What could you add to moving parts of a machine to reduce friction? | oil |
| What type of friction helps a parachute float slowly to Earth? | air resistance |
| The measurement of how fast something travels in a certain amount of time. | speed |
| A push or pull are examples of this. | force |
| The amount of matter an object has. | mass |
| The rate at which velocity changes. | acceleration |
| Cars can be described as this to reduce air resistance. | streamlined |
| How do action and reaction forces work together when a frog jumps from a log? | The action force is the frog pushing its legs backward on the log. The reaction force is the log pushing forward on the frog. The frog moves forward and the log is pushed backward. |
| How does friction affect inertia? | Friction is a force that affects inertia. It acts by slowing the movement of objects. |