Answer:
similar type of electric charges attract one another
I think this is a coorect staement
Answer:
Part a)


Part b)


Explanation:
Part a)
When ski start from rest

on this inclined plane we know that the acceleration is given as



now for final speed



now time taken by the ski to reach the bottom is given as



Part b)
Now when ski start with initial speed of 2.5 m/s
then we will have



now time taken by the ski to reach the bottom is given as



Answer:
4/3 pi R^3 = pi r^2 L equating volume of sphere and wire
r = (4 R^3 / 3 * L)^1/2 solving for radius of wire
r = (4 * 6^3 / 3 * 32)^1/2
r = 9^1/2 cm = 3 cm = .03 meters