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average speed constant velocity Section: Measuring Motion Which of the following is occuring all around us, even if we don't see anything moving? constant acceleration motion Section: Motion and Reference Points an object that stays at the same acceleration an object that stays at the same velocity an object that appears to stay in place an object that appears to keep moving What is a reference point? Section: Motion and Reference Points What is an object's change in position over time relative to a reference point called? speed acceleration friction motion Section: Standard Reference Points A nonmoving object on Earth's surface can be used as which of the following for seeing motion? a standard reference point a standard starting point a standard finishing point a standard midpoint Section: Motion in a two-dimensional System On the grid in the figure in your book on page 337 that illustrates motion in a two-dimensional system, where is the starting reference point? one position to the right on the x-axis where the x-axis meets the y-axis one position to the left on the x-axis one position up on the y-axis Section: Motion in a two-dimensional System How would the motion of an object moving to the right be describedin reference to t two-dimensional grid? in a positive direction on the y-axis in a negative direction on the y-axis in a negative direction on the x-axis in a positive direction on the x-axis The rate at which an object moves is its_______________. the total distance traveled divided by the total timetaken to travel is called________________. One way to express speed is the SI unit of __________ per second Section: Average Speed Place the terms in the correct sentence Average speed ? speed ? meters ? Section: Making a graph showing speed Distance units are plotted on the y-axis of a graph showing speed.Which of the following is plotted on the x-axis? meters speed motion time Section: recognizing speed ona graph Why might the distance traveled in a given second vary on a graph showing speed? because the speed is constant because the speed is not constant because there is no motion because motion is constant Section: VELOCITY Direction Matters What is the speed of an object in a particular direction called? distance speed velocity acceleration Section: Speed Versus Velocity Which of the following could describe an airplane's velocity? 600km/h 600 mi/h 600 mi/h south 600 south Section: Speed Versus Velocity What is the difference between speed and velocity? Speed must include a direction Velocity must include a direction Speed and velocity are the same Velocity never includes a direction A decrease in speed is sometimes called ____________________ acceleration. The rate at which velocity changes over time is called____________________. An increase in speed is sometimes called ________________ acceleration. Negative acceleration is also called ____________________________. Section: Acceleration Use the terms from the following list to complete the sentences below: positive ? deceleration ? negative ? acceleration ? Section: Circular Motion: Continuous Acceleration What is the acceleration that occurs when an object moves at a constant speed in a circular motion called? velocity positive acceleration negative acceleration centripetal acceleration Section: recognizing Acceleration on a Graph What does positive acceleration look like on a graph of speed versus time? velocity positive acceleration negative acceleration centripetal acceleration |