X=C2t2+C1t+C0
При t=0 x0=9
t2=4x2=105 см
X0=2C2t+C1
C0=9
C1=8
105=C2 *42+8*4+9
16C2=105–24–9=72
C2=4,5
X=4,5t2+8t+9
a=
V=r2
R2
Vm=r3*
atm=r3
atm=R3
anm=R3