A running man has the same kinetic energy as that of a boy of half his mass. The man speed up by $2 m s^{- 1}$ and the body changes his speed by $x m s^{- 1}$ so that the kinetic energies of the boy and the man are again equal. Then $x$ in $m s^{- 1}$ is

- 22

+ 22

2

2

Views: 812 students

Found 5 tutors discussing this question

Lucas Discussed

A running man has the same kinetic energy as that of a boy of half his mass. The man speed up by

2 m s^{- 1}

and the body changes his speed by

x m s^{- 1}

so that the kinetic energies of the boy and the man are again equal. Then

x

m s^{- 1}

14 mins ago

Discuss this question LIVE

14 mins ago

Question Text

A running man has the same kinetic energy as that of a boy of half his mass. The man speed up by

2 m s^{- 1}

and the body changes his speed by

x m s^{- 1}

so that the kinetic energies of the boy and the man are again equal. Then

x

m s^{- 1}

A running man has the same kinetic energy as that of a boy of half his mass. The man speed up by 2ms−1 and the body changes his speed by xms−1 so that the kinetic energies of the boy and the man are again equal. Then x in ms−1 is