NCERT Exemplar XVII — task. Science CBSE, Class 9.

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A girl having mass of

$35\ kg$ sits on a trolley of mass

$5\ kg$ . The trolley is given an initial velocity of

$4\ m s^{-1}$ by applying a force. The trolley comes to rest after traversing a distance of

$16\ m$ .

(a) How much work is done on the trolley?

(b) How much work is done by the girl?

Equation of motion,

$i^{i} - i^{i} = i \times i \times i$

Force is calculated by:

The formula to calculate the Work done( $W$ ) is,

(a) Work done on the trolley

$=$

$J$

(b) Work done by the girl

$=$

$J$

Did you find an error?

67. NCERT Exemplar XVII