Question

A car of mass 2400 kg with velocity of 20m/s os stopped in 10 sec by applying brakes . Calculate the retardation and the retarding force

Answer 1

Heya!Here is your answer friend ⏬
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Mass= 2400 kg

Initial velocity u= 20m/s

Final velocity v = 0 ( as it is stopped )

Using the formula ,

$a = \frac{v - u}{t}$
$a = \frac{ - 20}{10} = - 2ms {}^{ - 2}$
Hence retardation =
$- 2ms {}^{ - 2}$

Regarding force ,

Using force = mass ×acceleration

FOrce= 2400×-2

$= > - 4800$
Hence ,

Force = -4800N.


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Answer 2

Acceleration=v-u/t. =0-20/10

=-20/10 = -2m/s²

Force= m×a =2400×-2

= -4800N

Hope it helps you