Please answer both problems. I appreciate you!! A small sphere of charge q1 0.72
ID: 1879690 • Letter: P
Question
Please answer both problems. I appreciate you!!
A small sphere of charge q1 0.720 C hangs from the end of a spring as in Figure a, when another small sphere of charge q2-0.594 C is held beneath the first sphere as in Figure b, the spring stretches by d = 3.60 cm from its original length and reaches a new equilibrium position with a separation between the charges of r = 5.15 cm. what is the force 43.9 constant of the spring? Your response is within 10% of the correct value. This may be due to roundoff error or you could have a mistake in your ca culation carry out a intermediate rsults to it east our digit accuracy to minimize roundoff error. N/m 91 92 A proton accelerates from rest in a uniform electric field of 660 N/C. At one later moment, its speed is 1.10 Mm/s (nonrelativistic because v is much less than the speed of light) (a) Find the acceleration of the proton. m/s2 Over what time interval does the proton reach this speed? (c) How far does it move in this time interval? (d) What is its kinetic energy at the end of this interval?Explanation / Answer
Answering in short
Fspring = Felectro
kx = Kq1q2/r^2
k x 0.036 = 9 x 10^9 x 0.72 x 0.594 x 10^-12 / 0.0515^2
k = 40N/m
a = F/m = Eq/m = 6.3 x 10^10 m/s^2
t = v/a = 1.74 x 10^-5 s
s = 1/2 at2 = 9.54m
KE = 0.5mv^2 = 10^-15J