Question Number 28044 by Tinkutara last updated on 19/Jan/18
Commented by Tinkutara last updated on 19/Jan/18
Please check question 101 and it's answer. Is the answer correct?
Commented by mrW2 last updated on 19/Jan/18
$${Q}\mathrm{101}:\:{D} \\ $$
Commented by Tinkutara last updated on 19/Jan/18
Why is D correct? Why Reason is false?
Commented by mrW2 last updated on 19/Jan/18
$${The}\:{mass}\:{of}\:{cap}\:{ice}\:{will}\:{be}\:{distributed} \\ $$$${as}\:{water}\:{mass}\:{elsewhere}\:{over}\:{the}\:{earth},\: \\ $$$${the}\:{moment}\:{of}\:{inertia}\:{of}\:{earth}\:{will} \\ $$$${increase}\:{and}\:{the}\:{rotation}\:{of}\:{earth}\:{will} \\ $$$${be}\:{slower},\:{it}\:{means}\:{a}\:{day}\:{will}\:{be}\:{longer}. \\ $$$${Therefore}\:{the}\:{assertion}\:{is}\:{false}. \\ $$$${The}\:{reason}\:{is}\:{also}\:{false},\:{since}\:{the} \\ $$$${moment}\:{of}\:{inertia}\:{will}\:{increase}\:{and} \\ $$$${this}\:{decreases}\:{the}\:{speed}\:{of}\:{rotation}. \\ $$
Commented by mrW2 last updated on 19/Jan/18
Commented by mrW2 last updated on 19/Jan/18
Commented by mrW2 last updated on 19/Jan/18
$${I}_{\mathrm{2}} >{I}_{\mathrm{1}} \\ $$$${I}_{\mathrm{2}} \omega_{\mathrm{2}} ={I}_{\mathrm{1}} \omega_{\mathrm{1}} \\ $$$$\Rightarrow\omega_{\mathrm{2}} <\omega_{\mathrm{1}} \\ $$
Commented by Tinkutara last updated on 19/Jan/18
Thank you very much Sir! I got the answer from diagrams.