Question

Two bodies of equal masses move with uniform velocities v and 3v respectively. find the ratio of kinetic energy.??​

Answer 1

Answer:

Mass of first body =m

Velocity of the first body =v

Mass of second body =m

Velocity of second body =3v

The ratio of kinetic energies of the two bodies =KineticenergiesofsecondbodyKineticenergiesoffirstbody

                                                                         =21m(3v)221mv2=29mv221mv2

                                                                         =91

The ratio of the kinetic energies =1:9

Answer 2

Answer:

Mass of first body =m

Velocity of the first body =v

Mass of second body =m

Velocity of second body =3v

The ratio of kinetic energies of the two bodies =

Kineticenergiesofsecondbody

Kineticenergiesoffirstbody

=

2

1

m(3v)

2

2

1

mv

2

=

2

9

mv

2

2

1

mv

2

=

9

1

The ratio of the kinetic energies =1:9

Explanation:

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