v (m) 10 T 6 4 3 2 0 1 2 3 456 78910 What is the magnitude of the re- sulting fo

Question

v (m) 10 T 6 4 3 2 0 1 2 3 456 78910 What is the magnitude of the re- sulting force on the 5 nC charge at the origin? The Coulomb constant is 8.98755 × 109 N / Answer in units of nN 010 (part 1 of 2) 10.0 points An electron with 9.109 x 10-31 kg is acceler- ated from rest for 1 × 10-9 s by a uniform elec- tric field that exerts a force of 3.2 × 10-15 N on the electron. What is the magnitude of the electric field? The fundamental change is 1.602 × 10-19 C Answer in units of V/m 011 (part 2 of 2) 10.0 points What is the speed of the electron after it has accelerated for 1 × 10-9 s? Answer in units of m/s.

Explanation / Answer

part 10 )  

F = qE

E = F/q

here

E = electric field = ??

F = force = 3.2 x 10^-15 N

q = 1.602 x 10^-19 C

E = 1.9975 x 10^4 V/m

part 11 )

we know F = ma  

a = F/m

m = 9.109 x 10^-31 kg

a = 3.5 x 10^15 m/s^2

now using equation of motion

v = u + at

u = initial velocity = 0 ( starting from rest )

a = 3.5 x 10^15 m/s^2

t = 1 x 10^-9 s

v = 3.5 x 10^6 m/s

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