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motion review
| Question | Answer |
|---|---|
| what is velocity ? | the speed of something in a given direction. |
| What is speed? | the distance traveled per unit of time. |
| Explain displacement. | the moving of something from its place or position. |
| What is distance? | an amount of space between two things or people. |
| Explain acceleration. Tell three ways an object can accelerate. | An object accelerates when its velocity changes as a result of increasing speed, decreasing speed, or a change in direction Acceleration has a direction. Acceleration can be represented by an arrow. |
| Explain why deceleration is also acceleration. | ts acceleration is opposite to the direction of its motion. |
| What does a flat line on a distance/time graph represent? | Speed or velocity is plotted on the Y-axis. A straight horizontal line on a speed-time graph means that speed is constant. |
| Greater slope up means ____________ on a distance/time graph. | the object is returning to the start. |
| Greater slope down means ____________ on a distance/time graph. | the object is returning to the start. |
| What does a flat line on a velocity/time graph represent? | If the line is flat and horizontal, the object is traveling at a constant speed. |
| What does an upward slope on a velocity/time graph represent? | |
| What does a downward slope on a velocity/time graph represent? | |
| What does constant velocity mean? | |
| Tell three ways velocity can change. | it can slow down, it can speed up, or it can change direction. |
| If an object’s mass increases, its acceleration will ______________. | |
| Force = _________ x ____________ | Mass x Acceleration. |
| What are unbalanced forces? | cause a change in the motion of an object. |
| What are balanced forces? | two forces acting in opposite directions on an object, and equal in size. |
| Net force = _______________ | the sum of all forces on an object |
| What type of force does not cause acceleration? | |
| What is magnitude? | the great size or extent of something. |
| What is vector? | a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another. |
| Explain Newton’s First Law of Motion. | an object will remain at rest or inform motion in a straight line unless acted upon by an external face . |
| Greater mass = __________ inertia | more |
| Explain Newton’s Second Law of Motion. | the acceleration of an object is dependent upon two variables. |
| Explain Newton’s Third Law of Motion. | the force is a push or pull that acts upon on objects as a results of its interaction with another object. |
| What is inertia? | another word for Newton's First Law of Motion. |
| What is another name for Newton’s First Law of Motion? | law of inertia |
| What does air resistance depend upon? | affects the motion of the falling objects by slowing it down. |
| What is the formula for velocity? | The formula for velocity is change in displacement divided by change in time |
| What is the difference between speed and velocity? | Speed is the distance traveled per unit of time. velocity specifically refers to the measurement of the rate and direction of change in position of an object |
| What is the difference between mass and weight? | Mass is a measure of the amount of matter in an object The weight of an object is the force of gravity on the object. |
| How does your mass on Earth compare to your mass on the moon? | |
| How does your weight on Earth compare to your weight on the moon? | |
| Explain friction. How does it affect the movement of an object? | |
| How does the mass of an object affect the amount of force needed to accelerate the object? |
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