col7kings col7kings

03-04-2022
Physics

contestada

A car of mass 1200kg moving 90km/hr is brought to rest over a distance of 20m. calculate breaking force.

Respuesta :

col9kings col9kings

03-04-2022

Answer:

-18,750N

Explanation:

90x1000

-------------

3600

u=25m/s

v=0m/s

v^2=u^2+2as

v=0

=625+(2×a×20)

625+40a

-625=40a

a= -15.625 m/s^2

F=ma

=(1200)(-15.625)

= -18,750N

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