A car having mass 1000 kg is moving with speed of `36kmh^(-1)`. Calculate its momentum and kinetic energy.
(Verify the value of kinetic energy using `E_(k)=p^(2)//2m`. 'p' is momentum, how kinetic energy is equal `E_(k)=p^(2)//2m`? Think)

Answer

`10,000kgms^(-1);50,000J`

Explanation

`p=mv and E_(k)=(1)/(2)mv^(2)`, use these formulae.
`E_(k)=(1)/(2)mv^(2)xx(m)/(m)`
`=(1)/(2)(m^(2)v^(2))/(m)=(p^(2))/(2m)`