a=0.88 R=0.2 T=?
a=ω²*R ω=2*π/T
T=2*π*√(R/a)=2*3.14*√(0.2/0.88)≈3 c
=========================
m*v²/R=q*B*v
m1*v1*R2/(m2*v2*R1)=q1/q2
4*v1/(2*v2)=2
v1/v2=1
W1/W2=(m1/m2)*(v1/v2)²=4*1=4
Ответ: W1/W2=4
P = F/S
F = mg =7.32 × 10 = 73.2 Н
P = mg/4S (т.к. 4 ножки)
P = 73.2 / 4 × 0.0004= 73.2 / 0.0016 = 45750 Па
Q1=q2=q
F=k*q1*q2/R^2=k*q^2/R^2
q=sqrt(F*R^2/k)=sqrt(2*10^-4*25*10^-4/9*10^9)=7,4*10^-9 Кл