Exercise VIII — task. Science CBSE, Class 9.

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Certain force acting on a 20

$kg$ mass changes its velocity from 5

$m s^{- 1}$ to 2

$m s^{- 1}$ . Calculate the work done by the force.

The kinetic energy possessed by an object of mass (

$m$ ) and moving with a velocity (

$u$ ) is,

$E_{i} = \frac{i}{i} \times i \times i^{i}$

Initial kinetic energy of the object

$=$

$J$

The kinetic energy possessed by an object of mass (

$m$ ) and moving with a velocity (

$v$ ) is,

$E_{f} = \frac{i}{i} \times i \times i^{i}$

Final kinetic energy of the object

$=$

$J$

Work done

$=$

$J$

$1$

Did you find an error?

8. Exercise VIII