A thin-walled metal spherical shell of radius a = 5 m has a charge qa = 31 C. Concentric with it is a thin-walled metal spherical shell of radius b = 7a and charge qb = 33 C. Find the electric field at points a distance r from the common center, where (a) r = 1.5 m, (b) r = 10 m, and (c) r = 52.5 m.

no

sodium is solid at rt

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s