ngonzalez2777 ngonzalez2777
  • 13-01-2020
  • Physics
contestada

A 10000 kg freight car is rolling along a track at 3 m/s. calculate the time needed for a 1000 N force to stop it.

Respuesta :

aristeus aristeus
  • 14-01-2020

Answer:

Car will take 1.5 sec to stop

Explanation:

We have given mass of the car m = 10000 kg

Force needed to stop the car F = 1000 N

According to newton's law [tex]a=\frac{F}{m}=\frac{1000}{10000}=0.1m/sec^2[/tex]

As the car stops finally so final velocity v = 0 m/sec

Initial velocity u = 3 m/sec

According to first equation of motion [tex]v=u+at[/tex]

[tex]0=3-1\times t[/tex]

t = 1.5 sec

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