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14. Problem on force - Second law of motion and equations of motion

An object of mass 80

$kg$ is accelerated uniformly from a velocity of 4

$m s^{- 1}$ to 9

$m s^{- 1}$ in 7

$s$ .

Find the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.

Initial momentum

$=$

$kg$

$m s^{- 1}$

Final momentum

$=$

$kg$

$m s^{- 1}$

Force exerted

$=$

$N$

[Note: Enter your answers with 2 decimal digits]

$1$

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