Question

94. A car accelerates from rest at constant rate for the A a car accelerates from rest at constant rate for first 10 s and covers a distance x. It covers a distance y in the next 10s at the same acceleration. Which of the following is true?
(1) x = 3y
(2) y = 3x
(3) x = y
(4) y = 2 x

Answer 1

Answer:

In 1st case :

initial velocity (u) =0

time(t)=10s

displacement = ut + 1/2 at^2

x = 1/2 a 10 (10)

x = 50a

In 2nd case:

initial velocity(u)=final velocity in 1st case=10a m/s

time (t) =10s

displacement = ut +1/2at^2

y = 10a (10) + 1/2 a 10(10)

y =100a +50a

y=150a

y=3(50a)

y=3x

(2)is the answer

Answer 2

Explanation:

option (3) ।

।

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