A body dropped from a height $1\,m$ on a floor rises to a height $25\,cm$ after first rebound. The coefficient of restitution is :-
A body dropped from a height $1\,m$ on a floor rises to a height $25\,cm$ after first rebound. The coefficient of restitution is :-
- A
$\frac{3}{4}$
- B
$\frac{1}{4}$
- C
$\frac{1}{2}$
- D
$\frac{2}{3}$
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- [JEE MAIN 2019]
Write the equation of mass energy equivalence.
Write the equation of mass energy equivalence.
Two particles of masses $m_1$ and $m_2$ in projectile motion have velocities ${\vec v_1}$ and ${\vec v_2}$ respectively at time $t$ = $0$ . they collide at time $t_0$ . Their velocities become ${\vec v_1'}$ and ${\vec v_2'}$ at time $2t_0$ while still moving in air. The value of $\left| {\left( {{m_1}{{\vec v}_1}' + {m_2}{{\vec v}_2}'} \right) - \left( {{m_1}{{\vec v}_1} + {m_2}{{\vec v}_2}} \right)} \right|$ is
Two particles of masses $m_1$ and $m_2$ in projectile motion have velocities ${\vec v_1}$ and ${\vec v_2}$ respectively at time $t$ = $0$ . they collide at time $t_0$ . Their velocities become ${\vec v_1'}$ and ${\vec v_2'}$ at time $2t_0$ while still moving in air. The value of $\left| {\left( {{m_1}{{\vec v}_1}' + {m_2}{{\vec v}_2}'} \right) - \left( {{m_1}{{\vec v}_1} + {m_2}{{\vec v}_2}} \right)} \right|$ is