Question

A body of mass 5 kg uniformly retards from 40m/s in10s. calculate the retarding force.

Answer 1

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$\underline{GIVEN}$

mass = 5kg

Initial velocity = 40 m/s

Final velocity = 0 m/s

Time = 10 s.

$\underline{\:TO\:FIND}$

Force = ?

$\underline{SOLUTION}$

Acceleration = v - u/t

= 0 - 40/10

= - 40/10

= - 4 m/s²

Force = mass × acceleration

= 5 × - 4

= - 20 N

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