v(t)=(ω−ωcos(ωt))i+(ωsin(ωt))j,
a(t)=(ω2sin(ωt))i+(ω2cos(ωt))j,
speed=ω2−2ω2cos(ωt)+ω2cos2(ωt)+ω2sin2(ωt)=2ω2(1−cos(ωt))
원본 교재 풀이(영어)
v(t)=(ω−ωcos(ωt))i+(ωsin(ωt))j,
a(t)=(ω2sin(ωt))i+(ω2cos(ωt))j,
speed=ω2−2ω2cos(ωt)+ω2cos2(ωt)+ω2sin2(ωt)=2ω2(1−cos(ωt))