the speed of a moving car is tripled the distance travelled by it before coming to rest as compared to earlier will be
(a) three times (b) six times
(c)nine times (d) twelve times
Answers
Answered by
2
The distance traveled will be 9 times than earlier if speed is tripled.
Step-by-step explanation:
From the third equation of motion, we know that:
v² = u² + 2as
where u and v are the initial and final velocity, a is the acceleration and s is the distance.
If final velocity v = 0, then the equation will become:
u = √2as
Now given that the speed has tripled, then we find that the distance should be 9 times in order to balance the equation.
3u = √(2as*9)
Option C is the answer.
Answered by
1
nine time
v^2=u^2-2a (Retardation)
0=u^2-2as
S=u^2/2a
1st case_s1=u^2/2a
2nd case _s2= (3u)^2/2a
=9^u^2/2a
=9^s1 answer
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