The average time that it takes for the car to travel the first 0.25m is s. The average time to travel just between 0.25 m and 0.50 m is s.
Given the time taken to travel the second 0.25 m section, the velocity would be m/s.

the time taken to travel the second 0.25 m.

t1 = 3.16 s - 2.24 s = 0.92 s

t2 = 3.08 s - 2.21 s = 0.87 s

t3= 3.15 s - 2.23 s= 0.92 s

t=\frac{0.92 s + 0.87 s + 0.92 s}{3}=0.903

s=0.90 s

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

here are some information of the future of geothermal energy:

-the future of geothermal energy can pretty much be summed up with a single word: more

-scientists plan in going deeper than 120 meters

-we are hoping that one day, we will get all of our energy from renewable energy sources such as geothermal energy

hope this !