jee-main 2024 Q6

jee-main · India · session2_04apr_shift1 Work done and energy Energy conservation with friction or dissipative forces
If a rubber ball falls from a height $h$ and rebounds upto the height of $h / 2$. The percentage loss of total energy of the initial system as well as velocity of ball before it strikes the ground, respectively, are :
(1) $50 \% , \sqrt { 2 \mathrm { gh } }$
(2) $50 \% , \sqrt { \mathrm { gh } }$
(3) $40 \% , \sqrt { 2 \mathrm { gh } }$
(4) $50 \% , \sqrt { \frac { \mathrm { gh } } { 2 } }$ 
If a rubber ball falls from a height $h$ and rebounds upto the height of $h / 2$. The percentage loss of total energy of the initial system as well as velocity of ball before it strikes the ground, respectively, are :\\
(1) $50 \% , \sqrt { 2 \mathrm { gh } }$\\
(2) $50 \% , \sqrt { \mathrm { gh } }$\\
(3) $40 \% , \sqrt { 2 \mathrm { gh } }$\\
(4) $50 \% , \sqrt { \frac { \mathrm { gh } } { 2 } }$
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