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Chptr: 11 Kinematics
This is a review over chapter 11 in the Physical Science 6th edition textbook.
| Question/Term | Answer/definition |
|---|---|
| Define mechanics | the study of motion |
| Define kinematics | the study of how things move |
| Why did the Greeks think things moved as they did? | It was there nature |
| who were the two scientists who worked together in 1600 to study the motion of planets | Tycho Brahe and Johannes Kepler |
| Define Retrograde motion | the apparent reversal of planets in their orbits |
| Who described that planets moved in elliptical, not circular, orbits? | Johannes Kepler |
| How many laws of planetary motion did Kepler's work identify? | three laws |
| What did Galileo descover? | all objects in a vacuum, regardless of mass, fall at the same rate. |
| Classical mechanics | the study of how and why things move |
| What did Isaac Newton develope? | the first truly mathematical model of motion |
| What does Quantum mechanics describe? | the behavior of tiney objects |
| What does relativistic mechanics explain? | the motion of high-speed objects |
| Define frame of refrance | a coordinate system that we can use to describe the motion of objects |
| define system | a portion of the larger motion that we are interested in studying |
| What is the equation of displacement | ∆x=x𝓯-x𝓲 |
| define scalar | any quantity that consists of magnitude, or size, only. |
| define Vector | any quantity that consists of magnitude and direction. |
| Define speed | the distance traveled in an amount of time |
| Define velocity | the rate at which an object's position changes |
| what is the formula for speed? | S=d/t |
| What is the formula for velocity? | V=∆x/∆t |
| Is speed a scalar quantity or a vector quantity? | Scalar quantity |
| Is velocity a scalar quantity or a vector quantity? | vector quantity |
| Define momentum | a property of a moving system that is equal to its velocity multiplied by its mass. |
| What is the formula for momentum? | p=m(v) |
| state the law of conservation of momentum | within a closed system---that is isolated from outside pushes or pulls--- the total momentum remains constant. |
| Define acceleration | The change in velocity in a given amount of time |
| What is the formula for Acceleration? | a=∆v/∆t |
| Define free fall | the motion of objects that fall due to gravity alone with no other forces acting on them |
| what is the approximate value of free fall? | 9.81m/s |
| Define circular motion | motion moving in a circular path |
| Define centripetal acceleration | Acceleration that causes an object to move along a circular path. It always accelerates an object toward the center of a circle. |
| Define projectile motion | a two-dimensional motion of any flying object whose path is determined by the influence of external forces only, such as gravity. |
| Define trajectory | when a projectile follows a curved path |
| Define linear motion | Objects that move along in a straight path. |
Created by:
hihello2007
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