A skater races around a 500 the meter circular track a total of ten times. He crosses the start /finish line seven minutes after the start. Summarize the motion of the skater in terms of position, direction, and speed at the beginning, during, and the end of the race.
To summarize the motion of the skater, we need to consider the position, direction, and speed at different points during the race.
At the beginning of the race, when the skater starts from the start/finish line, his position is at the starting point of the circular track. This position can be considered as 0 meters or any convenient reference point on the track. The direction of his motion is counterclockwise since he is racing around a circular track. The speed at the beginning can be assumed to be zero since we don't have any specific information about it.
During the race, as the skater completes laps around the circular track, his position changes. After completing each lap, his position will be back at the starting point (0 meters). However, since he completed ten laps, his final position after the race will be 10 times the circumference of the circular track, which is 10 * 500 meters = 5000 meters. So, at some point during the race, his position will be between 0 meters and 5000 meters, depending on how many laps he has completed.
The direction of his motion remains counterclockwise throughout the race since he is continually moving around the circular track. The speed of the skater during the race is not specifically mentioned, but we can assume that the skater maintains a relatively constant speed. However, we don't have any information to determine the exact value of his speed.
At the end of the race, seven minutes after the start, the skater crosses the start/finish line again. So, his position at the end of the race is back to the starting point, which is 0 meters. The direction of his motion is still counterclockwise, as he is completing laps around the track. The speed at the end of the race is unknown, as we don't have any specific information about changes in speed during the race.
In summary, the skater's motion involves continuously circling the circular track counterclockwise, starting and ending at the start/finish line. The position varies between 0 meters and 5000 meters during the race, with a final position at 0 meters after completing ten laps. The direction of motion remains counterclockwise throughout the race, and the speed of the skater is unknown but can be assumed to be relatively constant.