a girl runs once around a circular track with a radius of 65m at a speed of 2m/s her displacement is

Answer 1

Hi Jazlynn G.,

Displacement is the difference between the final and initial position.

s = p_f - p_i = Δp, where s is the displacement, p_f is final position, p_i is the initial position, and Δp is the change in position.

In your problem the girls initial position and final position are the same, p_i = p_f.

Therefore p_f - p_i = 0, and s = 0.

Zero displacement is the answer.

I hope this helps, Joe.

Answer 2

Student,

Perhaps you meant to ask for the distance traveled? As Joseph pointed out, the displacement is zero since the initial and final positions are the same. The distance traveled is just the circumference of the circle, which is

C = 2πr,

where r is the given radius.