Acopper ball of mass 123 g is positively charged to +479 c. it is hung from a metal plate by a plastic, insulating spring of equilibrium length 29 cm and stiffness 2.1 n/m (1) if the plate is not charged, what is the extended length of the spring after the ball is suspended from it? (2) using standard data for copper, estimate the number of atoms there are in the ball per excess electron that charges it. atoms/e (3) if the plate is attached to a power supply and the ball raises back to its equilibrium length, what is the magnitude of the electric field puts out?

the answer is kevlar

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft