1. Describe the motion represented by a horizontal line on a distance-time graph. A horizontal line on a distance-time graph shows no change in distance, therefore there is no motion.The object is stationary. 2. Describe the difference between average speed and constant speed. Constant speed is motion that occurs with the same ratio of distance to time throughout the entire length of the motion. Average speed is the total distance traveled divided by the total time of travel and does not require the same ratio of distance to time throughout the entire length of the motion. Examples: average speed - The car was driven at a speed of 75 miles per hour for a period of time and then the driver slowed down to 40 miles per hour for a little while.The car was driven at an average of 65 miles per hour. constant speed - The car was driven at 65 miles per hour for the entire trip by using the cruise control. 3. During a trip, can a car's instantaneous speed ever be greater than its average speed? Yes, as seen in the above example for the ﬁrst part of the trip the car was driven at 75 miles per hour, but the average speed for the trip was only 65 miles per hour. As long as the car is driven slower for some part of the trip, the average speed will be less than the fastest instantaneous speed during the trip. Remember, instantaneous speed is the distance divided by time for a very, very short period of time. It is the speed for that instant of time. A car's speedometer measures instantaneous speed. 4. A car travels at a constant speed of 30.0 m/s for 0.80 hr. Find the total distance traveled in meters.

1. Describe the motion represented by a horizontal line on ...cashmorewhs.weebly.com/uploads/3/1/2/6/31267287/graphing_moti… · 1. Describe the motion represented by a horizontal

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Page 1: 1. Describe the motion represented by a horizontal line on ...cashmorewhs.weebly.com/uploads/3/1/2/6/31267287/graphing_moti… · 1. Describe the motion represented by a horizontal

2. Describe the difference between average speed and constant speed. Constant speed is motion that occurs with the same ratio of distance to time throughout the entire length of the motion. Average speed is the total distance traveled divided by the total time of travel and does not require the same ratio of distance to time throughout the entire length of the motion. Examples: average speed - The car was driven at a speed of 75 miles per hour for a period of time and then the driver slowed down to 40 miles per hour for a little while. The car was driven at an average of 65 miles per hour. constant speed - The car was driven at 65 miles per hour for the entire trip by using the cruise control.

3. During a trip, can a car's instantaneous speed ever be greater than its average speed? Yes, as seen in the above example for the first part of the trip the car was driven at 75 miles per hour, but the average speed for the trip was only 65 miles per hour. As long as the car is driven slower for some part of the trip, the average speed will be less than the fastest instantaneous speed during the trip. Remember, instantaneous speed is the distance divided by time for a very, very short period of time. It is the speed for that instant of time. A car's speedometer measures instantaneous speed.

4. A car travels at a constant speed of 30.0 m/s for 0.80 hr. Find the total distance traveled in meters.