Question

plzz solve it's urgent​

Answer 1

Answer:

18m

Explanation:

v=0

a= - 4m/s

so, v=u+at

u= 12m/s

S= ut + ½at²

S= 12×3 - ½ × 4× (3)²

S= 36 - 18

S= 18 m

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Answer 2

Answer:

THE ANSWER IS 18m.

Explanation:

• ACCELERATION= -4m/s^2(brakes are applied then the acceleration is negative or it is called retardation)

• FINAL VELOCITY=0(because brakes are applied and the car will stop after sometime)

• TIME=3s

• DISTANCE(S)=?

• INITIAL VELOCITY=?
• V=U+at  (Substitute the above values in the given equation and find the value of u=initial velocity.)

1. so, 0=U+(-4*3)
2. U=12m/s

⇒SO NOW THE DISTANCE IS::

1. S=UT+1/2AT^2

S= 12*3+1/2*(-4)*(3)^2

⇒36+(-18)

S=36-18m

S=18m