A) tide duration is reduced
B) earth rotates slower
C) time period of earth decreases
D) duration of day increases
Correct Answer: C
Solution :
Using the law of conservation of angular momentum, ie, \[I\omega =\] constant or \[m{{r}^{2}}\omega =\] constant \[[\because \,I=m{{r}^{2}}]\] or \[\omega \propto \frac{1}{{{r}^{2}}}\] Therefore, if the radius of earth reduces, co will increase. As a result time period \[T=\left( \frac{2\pi }{\omega } \right)\] will decrease. Hence, on reducing the radius of earth its time period is decreased.
You need to login to perform this action.
You will be redirected in
3 sec
