Odpowiedź:
zad1
m=20g=0,02kg
r=15cm=0,15m
n=5
t=0,5min=30s
a)
T=t/n
T=30s/5
T=6s
b)
f=1/T
f=1/6s
f=0,17Hz
c)
v=2πrf
v=2*3,14*0,15m*0,17Hz
v=0,16m/s
d)
F=mv²/r
F=0,02kg*(0,16m/s)/0,15m
F=0,003N=3mN
zad2
v1=60km/h=16,67m/s
F1=6000N
v2=90km/h=25m/s
F1=m*v1²/r
F1/v²=m/r
F1/v1²=F2/v2²
F2=F1*v2²/v1²
F2=6000N*(25m/s)²/(16,67m/s)²
F2=13494,6N
