If the radius of earth contracts 1n of its present value, the length of the day will be approximately
24nh
24n2h
24 n h
24 n2 h
Conservation of angular momentum L=Iω=25MR2×2πT=constant
∴ T∝R2 [If M remains same]⇒T2T1=(R2R1)2=(RnR)2=1n2⇒T2=24n2hr [As T1=24 hr]