Question

Jill started the race at the white line. She then ran around the track two times. Each lap is 100 meters. When she stopped, she ended back at the white line. What is Jill's displacement?

Answer 1

Jill's total displacement and the magnitude of final displacement are both zero because she ended up at the same place she started. Consequently, her average velocity is also zero, as velocity is displacement over time.

Step-by-step explanation:

Jill started the race at the white line and ran around the track two times, each lap being 100 meters. When she stopped, she finished at the white line again. Since displacement is the shortest distance from the initial to the final position of an object, Jill's displacement would be zero. This is because her final position was the same as her starting position, regardless of the distance she ran.

The magnitude of the final displacement is also zero since displacement considers the direct line between the starting and ending points, which for Jill is null.

Regarding the average velocity during her trip, this would also be zero because velocity is the displacement over time, and since her displacement is zero, no matter the time taken, her average velocity would compute to zero.