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A car is moving with a …

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A car is moving with a velocity of 12m/s.On applying brakes,it comes to rest in 6 second.calculate the acceleration and distance coverd in this time period?
  • 1 answers

Gaurav Seth 5 years, 2 months ago

Initial Velocity( u) = 12 m/s

Final Velocity ( v) = 0 m/s

It comes to rest in 6 sec

To find : a= ?
distance covered in this time period = ?

Solution

v = u + at

0 = 12 + a× 6

-12/6= a

a= -2 m/sec²

distance

( I ) s= ut +1/2 at²

(II) 2as = v²-u²

by II formula

2×(-2) × s= (0)²-(12)²

-4s= -144

s= 36 m

by l formula 

s = (0)×6+1/2×(2)(6)²

s= 0+1(36)

s=36 m

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