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Stack #4736678
| Question | Answer |
|---|---|
| Motion | Is a change in an object position overtime |
| Reference point | The object that appears to stay in place |
| Reference frame | A set of objects that are all stationary with respect to each other |
| Speed | A measure of the distance and object moves in a given amount of time |
| Average speed | |
| Velocity | An object is a quantity that describes the speed of the object and its direction of travel |
| Constant velocity | Is always motion along a straight line |
| Acceleration | The rate of velocity changes |
| Positive acceleration | If it has a positive velocity and it’s speed increases |
| Negative acceleration | Moving in the positive direction and it speed decreases |
| Newton’s first law of motion | Unless acted on buying an unbound for an object stays at rest and an object in motion stays in motion at a constant velocity It also is called the law of inertia |
| Newton second law of motion | The acceleration of an object depends on the mass of the object, and the amount of force applied |
| Newton’s third law of motion | When one object applies a force to a second object, the second object applies an equal, and opposite force to the first object |
| Interia | The tendency of objects to resist any change of motionU |
| Action and reaction force | The pair or forces described by Newton’s third law |
| Describe the difference between a reference point and a reference frame | A reference point is one place or object used to tell if something moves. A reference frame is the surroundings used to describe moti |
| How can speed be measured? | By measuring the distance traveled and the time it takes. |
| How is speed calculated? | Speed = distance ÷ time. |
| How was the direction indicated for velocity? | By giving the speed and a direction, such as 30 mph north. |
| What is the net force on an object when the forces are balanced? What does that mean for the object motion or lack thereof | The net force is 0 N. An object stays still or continues moving at a constant velocity. |
| Describe the forces acting on a bus that is stopped at a stop. How would the forces change if the bus started moving? | Gravity pulls down, and the ground pushes up. The forces are balanced. When the bus accelerates, there is an unbalanced forward force. |
| Describe how friction connects to Newton’s first law of motion | Friction is a force that opposes motion and can cause a moving object to slow down or stop. |
| How does mass affect interia | Friction is a force that opposes motion and can cause a moving object to slow down or stop. |
| How is Newton’s Law express mathematically | Force = mass × acceleration, or F = ma. |
| Compare the acceleration of two objects, have different masses, and the same amount of force supplied | The object with less mass accelerates more. The object with more mass accelerates less. |
| Analyze the amount of force between objects at the same time of a collision. Is there a difference if the objects are the same mass or different masses? | Both objects exert equal forces in opposite directions, even if their masses are different. Their accelerations may be different. |
| You stepped off the log flume boat onto the platform. What happens to the boat? | The boat moves backward as you push forward to step onto the platform. This demonstrates Newton's third law. |
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user-1950376